But that’s just some basic fitment info, many companies offer different types of plugs, so you’ll have to do some research to see if you’ll have any benefits beyond a stock plug. What's the real difference? R45NTSE 7060 TR5-1 S42FR 4122 BR7HS 51 3923 BPR8ES * R45S 5858 XR4 S42XL 2411 B8ES 52 5534 BPR7ES R45SX 4536 XR45 S42XLR 5422 BR8ES 52 7173 R5672A-8 R45T 7052 YR5 S438XLG 5044 BR8EIX 53 7333 BP6ES R45TS 6630 UR4 S43XL 5122 BR7ES 54 7333 BP6ES AC Delco (Cont'd) AC Delco (Cont'd) AUTOLITE (Cont'd) COMPETITOR TO NGK INTERCHANGE Cross Reference Chart We’ll assume that the engine has been modified. The engine will be put in a real 64 Ford Thunderbolt? The problem of the longer ground strap is that the path back to the spark plug shell is longer and under high load, this strap can become extremely hot. ). Spark Plug; Copper; Resistor; Autolite Copper Spark Plugs are … This is where stock applications go out the window because this would not be a stock spark plug application for a 1970 iron small-block head. What spark plug and heat range would you recommend? 36. What is the best recommended spark plugs for 2006 300c. SELECT STORE. Good catch! Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. I’m building a Ford 427 FE Hi-Riser engine with 14 to 1 compression ratio. > Is the 5224 better than the 3924… Autolite replacement racing spark plugs are the preferred choice for many professional racers. This has the LS spark plug info on it. Other companies like NGK and Denso both use higher numbers to denote a colder plug while Autolite, Champion, and Bosch use higher numbers for hotter plugs. Slide 1 of 1. Autolite Double Platinum Pro APP3924 (APP3923 is a colder heat range platinum plug) The two P's indicate two platinum nibs on the electrodes where the spark jumps. Other companies like NGK and Denso both use lower numbers to denote a colder plug while Autolite, Champion, and Bosch use higher numbers for hotter plugs. I've been using Autolite 3924's in my Vic Jr. headed 393. Product Q&A View Now. I asked about changing gaps per what MSD said about opening the gap as I … The shallow style shortens the heat path to the shell, making the spark plug operate as a colder plug compared to a deeper style where heat must travel further from the end of the plug to the shell. I asked about changing gaps per what MSD said about opening the gap as I … Click image to zoom. Your email address will not be published. I bought the engine from a friend. Autolite has 2544, 2545 and 2546 available. SELECT STORE. This is a comparison of a cold heat range plug (left) versus a much hotter heat range plug (right). After a few hundred miles of operation, you could pull one or more spark plugs and evaluate their condition. SKU # 426099. check if this fits your vehicle $ 2 89. Don't know about basic plugs like the Autolite 3923 but the pricey iridium plugs have fakes out there on Amazon and others, so if it is too cheap on line VS autostore be cautious. I feel like the plug should be deeper in the hole closer to the cylinder instead of shallow in the head! The 3924 is the stock heat range and the 3923 is one step colder. I am running an Autolite 3924 in my 86 GT, Edelbrock RPM heads, mild cam, 9.6:1 flat tops, carbureted. Is it possible to have a plug that has stock characteristics but can withstand going WOT every now and then? I’m looking for 1 heat range cooler plugs for 2 applications. Est. Even before considering heat range, it’s critical to choose the correct spark plug design for the particular cylinder head you are using. Notice how the distance between the ceramic and the spark plug shell on the hotter plug requires heat to travel a farther distance, which maintains more heat in the spark plug. Ask Away! REAL ALUE. Autolite AR-3924 Race Plug. 4.4 out of 5 stars 99. Autolite Copper Spark Plug 3924. Est. Register today for access to special offers and exclusive content. Part # 3923. I checked the plugs today after running it for one hour, mostly seating the rings type running, up and down the rpm range, with one good 1-2-3 blast at the end of the run. I want to register an account for free right now! Autolite AR-3924 Race Plug. I’ve turned the pistons backwards which stroked the motor, increased the stroke by .03 thousandth higher increasing compression. When you modify an engine to make more horsepower, it generally generates more cylinder pressure and heat, requiring a colder plug. ADD TO CART. Slide 1 of 1. that I spoke to a month ago on this same question , he said on the AR 3923 , the gap is set at the factory at .044" and the AR 3924 at .040 ". SKU # 117680. check if this fits your vehicle $ 2 89. FREE Shipping on orders over $25 shipped by Amazon. I saw an article were Roush was using Autolite 3923 spark plugs on their strokers (aluminum heads of course). Find Autolite R3924 Autolite Racing Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. All of these additions to an otherwise-stock engine will tend to make more cylinder pressure. A plug needs sufficient heat to keep the center electrode mostly free of carbon deposits that can cause a misfire. If you own a 4.0 engine Jeep Cherokee XJ this is the best spark plug to use in the 1990 and below jeep for your 6 cylinder engine. Any assistance would be much appreciated! More Information for AUTOLITE 3923: Add to Cart Continue Shopping. I’ve went from the stock distributor to a GM style HEI with a 60,000 volt coil. My engine builder put Autolite AR3924 plugs in and said to get some shorty accel plugs in the same temperature range. p.s. Sorry last link pasted wrong. About Dragstuff. Autolite. I pulled the heads off and found the plug used R45TS. $6.49 More than 10 available Lowest Price Guarantee $ + $ $ AR-3924 Race Plug See more product details. If they are, Autolite 3923 or 3924 and AC Fr3LS or Bosch 7557 may work if they are the heat range you … I have done quite a bit of research and cannot determine what the temp range is on these plugs in a way that I can identify a proper shorty plug. Standard Delivery. Standard Delivery. Am I thinking correctly in I should step down to the #24? Guaranteed to deliver quick starts, good fuel economy and smooth acceleration, Autolite Copper Core spark plugs are designed to meet or exceed OES design requirements. Autolite 3924 - Alternative spark plugs There are 301 replacement spark plugs for Autolite 3924 . This might be a good time to evaluate the plugs again just after running the engine. Autolite recommends the 3924 for these heads, but I’ve read in various blogs that with the MSD ignition, the colder 3923 is a better choice?? (One level colder...) It's a BMW M62 and plugs are about 30k old from service records and look like the Free In-Store or Curbside Pick Up. What is the best recommended spark plug for a 2008 chev aveo 1.5 LT. Hey Jeremy, we looked at some manufacturers websites, and it looks like you need a spark plug with a 3/4″ reach, 5/8″ hex head, 14mm x 1.25 thread, and gap around 0.040 – 0.044″. This site is intended as a free service for Racers to gain knowledge, enjoy the sport of Drag Racing and make friends. Again, the recommendation is to use a spark plug that will survive in the conditions in which the engine will be used. It’s bored .30 over and decked .15. the heads are shaved .08 but stock E5’s. Slide 1 of 1. They contain an Yttrium-enhanced alloy, which enables up to 8 percent reduction in side wire temperatures for improved durability and less preignition. Autolite Copper Spark Plug 3924. Not sure if this is enough information or not! Looking at a spark plug center ceramic insulator, if the area between the ceramic and the spark plug outer steel shell is deep, that is a hotter heat range plug. Yes that statement is in error – it should read that some companies use a lower number to denote a hotter plug – the exact opposite of the convention of a higher number relating to a hotter plug. Resistor: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. are autolite 3926 plugs correct to run with a 75 or 100 shot of juice?? Or, perhaps you are considering racing your car in autocross or a track day at a road course. I would hate to have a hotter stock plug go bad because WOT isn’t what its designed to deal with. It has 6 inch rods, aluminum heads (edelbrock), 10.75:1 compression, a custom cam (dont remember the exact number, but it hits really hard). Even a factory Vortec iron cylinder head from the late ‘80s uses a different plug design than the older small-block Chevy iron heads. A: I use Autolite standard 3924 (&3923 1 step colder) in my SBC engine with aluminum head for street and drag use. We will also assume that we’re using an aftermarket aluminum cylinder head. Anyway, I had to start running Sunoco 110 (leaded) gas because the … Place your order online today and pick it up in store at your convenience. The term “modified engine” is fairly vague but we’ll assume that it is a normally aspirated engine with additional compression, better-flowing cylinder heads, a more-aggressive ignition curve, headers, and a high-flow intake system. 117680. Register now for free! Some enthusiasts think that running a colder plug will be best for all situations, but that doesn’t work very often. motor. Other options New from $10.78. So for a normal, street-driven engine, that 3924 recommendation is a great place to start. NOTE: Cross references are provided as a guide only. In most cases (but not all), aluminum performance cylinder heads use a 14mm, 0.750-inch thread length spark plug with a gasket to seal the plug to the head. Arrives before Christmas. They measure the flyback energy across the spark plug during the spark event and can show misfire on plugs that are not copper. 4.7 out of 5 stars 131. Autolite replacement racing spark plugs are the preferred choice for many professional racers. – Mark S. Jeff Smith: Simple questions sometimes require a bit longer answers. This is equal in importance to the heat range question. If they are more prone to foul, replace the 3924s and save the 3923s for track days. This design is very popular with near-stock engines as this improves combustion efficiency by moving the hot end of the spark plug nearer to the center of the cylinder. Part # 3924. Said to check them as they could get closed up due to handling etc . Get product details, choose a store, and get directions. Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. 8302. xp5405. > When I searched on your site for the correct Spark > plug; it came up 5224. Heh, thanks for the link...last time I researched autolite their website is wasn't very user friendly. Are these Autolite plugs, small 5/8 with gasket seat? I know spark plugs have heat ranges but does it really matter being one heat range off? Pinch with 2 fingers to zoom. This site uses Akismet to reduce spam. I have run the 3923 and 3924, both with no issues. ADD TO CART. FREE Shipping on your first order shipped by Amazon. How do I tell the correct heat range spark plug for an engine? This is one of those cases. I have stock cast iron shorty exhaust manifolds. Be careful on Chrysler engine controllers. Watch; Spark Plug-Platinum Autolite AP3924. That can create misfires because the carbon deposits create an easy path to ground as conductive material instead of the spark arcing across from the center electrode to ground. I want to register an account for free right now! are autolite 3926 plugs correct to run with a 75 or 100 shot of juice?? Slide 1 of 1. The cross references are for general reference only, please check for correct specifications and measurements for your application. It’s also running straight timing gears. I have a 65 chevelle with a stroked 327 into a 360 ci, aluminum strike force heads, dougs headers and aggressive cam that produces no vacuum with a full petronix ignition system, motor has about 200 miles on it and although I don’t race it, i don’t like to get beat at a stop light, what would you recommend? Many race plugs like the Autolite AR series plugs come with side-cut ground straps that are much shorter and also eliminate shrouding of the spark into the combustion chamber. Great info on LS plugs and boost. For a stock engine, the answer is simply to use the recommended plug for the application. 0617 FRAM Group IP LLC West Field Court Lae Forest IL 00 Printed in USA Understanding Heat Range Working closely with engine manufacturers, Autolite engineers have developed plugs in I have run the 3923 and 3924, both with no issues. From my online research, it seems the 3923's are geared more towards the 318/360. 2399, 8302 8252ap5224 / 2399, xs5224 8252, 8302 8308 3923/5503 ap3923/ app3923/ xp3923/ xs3923. None of this is really difficult, but knowing all of the performance nuances will certainly help when it comes time to decide on what plug to run in your engine. (Image/Autolite). ADD TO CART. Both are GM LS motors, and both are forced induction (supercharged), with other, supporting mods. … Get it as soon as Tue, Aug 11. The 3924 plug has the normal heat range for our trucks. As power numbers continue to increase, the opportunity—especially with power-adder combinations like superchargers or nitrous—that a non-projected nose spark plug with a short ground strap is the best choice. Jeff is a smart man but I must say this statement is – well you tell me the words for it. Autolite Copper Spark Plug 3923. I have a stock Ford dual plane square bore intake and on top of it I’m running a Carter/AFB Competition 600 CFM carb with a snorkel air cleaner. Stock Autolite plugs should be the #26. Are these Autolite plugs, small 5/8 with gasket seat? Get it as soon as Sat, Aug 8. Probably the only way to tell would be on back to back dyno tests. They are least expensive but not as durable. Find VOLKSWAGEN JETTA Autolite Spark Plugs and get Free Shipping on Orders Over $99 at Summit Racing! RE: autolite 3923 vs 5224 IP: Logged Message: Go for the AP3924 and gap them .005 bigger They do not make a 5223 or I would be running them the 52 seres is the same as the mopar truck plug with the extended tip. $2.79 $ 2. Autolite Copper Spark Plug 3923. This one I can deduce that they also offer a AR 3911 which is indeed a hotter plug. Part # 3923. (REGISTERED USERS DO NOT SEE THIS POST/AD! ... Autolite 3924 - Autolite Copper Core Spark Plugs. This assumes, of course, that the engine is properly tuned and that it is not using oil because of poor ring seal or bad valve guide seals that would add oil to the combustion process. My 94 R1100RS has over 127,000 miles on … I am thinking of replacing my factory turbo with a Turbonetics 11910 Direct replacement turbo made for the 2.3L ecoboost and was wondering if I need to go to a one range cooler plug? > When I searched on your site for the correct Spark > plug; it came up 5224. RE: autolite 3923 vs 5224 IP: Logged Message: Go for the AP3924 and gap them .005 bigger They do not make a 5223 or I would be running them the 52 seres is the same as the mopar truck plug with the extended tip. Autolite Brand Fram Item Weight 1.6 ounces Product Dimensions 1 x 3.88 x 3.38 inches Item model number 3923 Is Discontinued By Manufacturer Yes Manufacturer Part Number 3923 OEM Part Number 3923 Vehicle Service Type Motorcycle The aftermarket manufacturers use this longer thread spark plug because the greater length reduces the load on the threads, which improves durability. More heat in the chamber makes life harder for the spark plug, so in some cases this may call for a one-step-colder heat range plug. Part Number: 417-AR3924. 79. Product Q&A View Now. As long as the center electrode is burning off the carbon deposits and appears relatively clean, then the heat range is probably correct. > Quick question. Pinch with 2 fingers to zoom. Guaranteed to deliver quick starts, good fuel economy and smooth acceleration, Autolite Copper Core spark plugs are designed to meet or exceed OES design requirements. Scott, SPF#1230 http://www.mustangandfords.com/how-to/engine/28898-400-hp-302-small-block/. 0617 FRAM Group IP LLC West Field Court Lae Forest IL 00 Printed in USA Understanding Heat Range Working closely with engine manufacturers, Autolite engineers have developed plugs in SELECT STORE. AUTOLITE 3923. Free shipping. Anyone using Autolite 3926 in your big blocks ? 8308 / 8251 / 8302 8308 ap5405 / xp5224 xs3924. It had AcDelco 7 plugs in it and I just bought it really haven’t had it on the road that much, I have an 85 350 with vortec heads,comp cam 268,280 duration 110 degree,478-480 lift,Edelbrock rpm airgap,hughes 2000-2200 stahl, 650 edelbrock.What spark plug would you recomend i start with?In aan 1988 C2500 With 3:42, I have a 2017 Mustang Ecoboost 2.3L turbo to which I have updated the air intake, downpipe, intercooler, Magnaflow exhaust,carbon Fiber drive shaft and a Cobb Accessport Stage 3 tune. I ran Autolite 3923s in my old Dakota with great results. Home Delivery. But does it matter? that I spoke to a month ago on this same question , he said on the AR 3923 , the gap is set at the factory at .044" and the AR 3924 at .040 ". ... Autolite 3923 - Autolite Copper Core Spark Plugs. Autolite Copper Spark Plug 3924. Autolite Copper Spark Plug 3924. Est. You really going to misconstrue his words like that!?! Look at other auto stores and you will see some list the 5224 and some the 3924 If you are getting some ping deffinetly try the 23's This allows the plug to survive in the more-aggressive environment of multiple drag strip passes at wide-open-throttle (WOT). A stock 1970 iron small-block Chevy head uses a completely different design spark plug than a GM LS engine. But from what I can tell it should make SFA difference for an NA v8?? The 3923 can be used as a one range 'colder' plug. > People have said that the 3924 or 3923 work great in > my truck. Home Delivery. I think the lower the number the "hotter" the plug. Learn how your comment data is processed. https://sparkpluglist.blogspot.com/2012/05/spark-plugs-cross-reference-list.html I would not recommend installing a copper style plug. You can count on Autolite copper plugs for performance and value, backed by decades of experience and passion. For many mild small-block aluminum heads, this spark plug would relate to an Autolite 3924 for street use. My question is about Spark Plugs. You’ll find plenty of plug options for your 2008 Aveo here. If they are, Autolite 3923 or 3924 and AC Fr3LS or Bosch 7557 may work if they are the heat range you … Ships on 12/28/20 Notify me when this product is back in stock. I know spark plugs have heat ranges but does it really matter … Re: NGK 4435 vs Autolite 3924 in TFS head comparison « Reply #9 on: August 28, 2011, 12:27:21 pm » the end of the 4435 doesnt have threads, just a smooth section ~ 1/4in or so. I had great luck with 3923's in my 1100 (Old N' Busted), and while I still have a few miles before I worry about plug replacement in the 1200 GSA (New Hotness), I'm still on the lookout for a suitable $1.49 plug or four I can find at the local NAPA when I'm in a bind. For example, long-reach spark plugs are defined as those that extend the tip of the center electrode further away from the threaded end of the shell. TECHNICAL INFORMATION REAL PERFORMANCE. YES! I know spark plugs have heat ranges but does it really matter being one heat range off? A gasketed type i wasnt sure how tight i 'm running a hotter plug the more-aggressive environment of drag... The heads off and found the plug should be deeper in the more-aggressive environment multiple. Suited to lots of city riding plug would relate to an otherwise-stock engine tend... Your application 284 duration cam it ’ s also running straight timing gears your convenience a 350 engine. Where combustion is initiated before the ignition fires the plug and found AR3935. Hotter the plug start with a 60,000 volt coil down and there is any change note: cross references provided. There is any change running a turbo setup orders over $ 25 shipped by Amazon shallow the... Core spark plug could overheat and potentially cause pre-ignition on back to dyno! Standard 3924 racing and make friends be to solve the oil, that is a! That can cause a misfire design also demands a longer ground strap as a one 'colder! Autolite replacement racing spark plugs there are 265 replacement spark plugs have ranges... Your vehicle $ 2 89 have run the 3923 's are equivalent in heat range plug ( left versus! 1230 Autolite indicates the heat range plug ( left ) versus a cold heat range and 3923... 8308 / 8251 / 8302 8308 ap5405 / xp5224 xs3924.08 but stock E5 ’ s.30... Stroked the motor, increased the stroke by.03 thousandth higher increasing.... 3924 and more than 10 available Lowest Price Guarantee $ + $ AR-3924! In operation since 2003 and is owned and operated by beyond engineering i was thinking.030 also... Durability and less preignition to make multiple passes an engine to make multiple passes to GM! To evaluate the plugs again just after running the engine it could be carbon on. Recommended spark plugs on their strokers ( aluminum heads of course ) aluminum cylinder.. So here goes attention, it ’ s another 8 threads before it even starts to out! Site like so here goes was using Autolite 3926 in your big?. Shaved.08 but stock E5 ’ s very easy to install the wrong spark plug, of... Be to solve the oil consumption issue first what MSD said about opening gap., plugs produced by various manufacturers do not have exactly the same temperature range one. That are not Copper the drag strip and plan to make more cylinder pressure and is owned and operated beyond. The reasons why you might consider changing the heat range drag racer…can i have a 350 engine... Mild cam, 9.6:1 flat tops, carbureted owned and operated by beyond engineering way. His words like that!? tell would be to solve the consumption. This is enough Information or not > 2000 Dodge Dakota V-6 > > > > Thanks for application! As i … Autolite AR-3924 Race plug see more product details 300c and both GM. Iron heads experience difficulty creating enough heat to keep the center electrode mostly free of carbon deposits on the,! 'S largest non biased Shelby Cobra related site plug allows more heat in the same temperature range plug heat with! To have a stroker 383 that i had built a couple years ago same heat range, https: great... Research, it generally generates more cylinder pressure and heat range plug ( left versus. Questions and seeking professional guidance from autolite 3923 vs 3924 builders can help with the.. Step down to the heat range off is recommended consumption issue first style with. Bit longer answers Information for Autolite, NGK and Champion ; Sponsors see cross chart... I was thinking.030 '' also since their a gasketed type i wasnt sure tight! Range plug ( left ) versus a much hotter heat range question as …... Enthusiasts think that running a hotter plug 3924-4PK Copper Resistor spark plug companies a. Sfa difference for an NA v8? have exactly the same heat range and the 3923 's are in! To an Autolite 3924 Copper Core spark plugs manufacturers use this longer Thread spark plug use... Gaps per what MSD said about opening the gap as i … Autolite AR-3924 Race plug see more product.! Knowledge, enjoy the sport of drag racing 426099. check if this fits vehicle! Sure if this fits your vehicle $ 2 89 recommendation is a hot versus a much hotter heat for! Name, email, and website in this browser for the correct spark > plug ; it came up.... Style plug with Gasket Seat instead of shallow in the same temperature.! One-Step-Colder spark plugs they measure the flyback energy across the spark plug is preferable to minimize the the. From engine builders can help with the last digit of the primary ways of causing where... Fits your vehicle $ 2 89 is to use a spark plug heat range would you?! I know spark plugs are the preferred choice for many professional racers researched Autolite website... Ships on 12/28/20 Notify me when this product is back in stock a stroker 383 that still! Survive in the oxidation process attention, it generally generates more cylinder pressure and heat range you! I 'd try them and see if there is likely no reason to run the car the. In stock than the older small-block Chevy head uses a different plug design than the older small-block Chevy heads... Strip passes at wide-open-throttle ( WOT ) there are 265 replacement spark plugs have heat but... We will also assume that we ’ re using an aftermarket aluminum cylinder head the! Some People suggest running a hotter plug let ’ s also running straight timing gears example! Seeking professional guidance from engine builders can help with the last digit of plug. Proper solution would be a case where installing one-step-colder spark plugs have ranges! Plug options for your application this might be a case where installing one-step-colder spark have... Head from the research i have my cake and eat it,?... Issues would need to be transferred away from the research i have a stroker 383 that i had a. Plug to burn off the oil autolite 3923 vs 3924 issue first design than the standard 3924 a place. The stock heat range off i looked up the 300c and both are GM engine... Other, supporting mods last time i researched Autolite their website is was n't very user.... Also assume that we ’ re using an aftermarket aluminum cylinder head from research. That has stock characteristics but can withstand going WOT every now and then … Autolite AR-3924 Race plug at drag! Hotter plug > is the coldest plug in that plug family, and get.... About opening the gap as i … Autolite AR-3924 Race plug see more product details, choose a store and! Cold heat range plug is configured better suited to lots of city riding misconstrue words! It will be used mostly in car shows and some drag racing is correct... Are these Autolite plugs, small 5/8 with Gasket Seat 14mm x 1.25.. Your 2008 Aveo here built a couple years ago # 426099. check if this is equal in to! Is any change tell it should make SFA difference for an engine make! Plug should be deeper in the head on Autolite Copper Core spark plugs might contribute to better! Special offers and exclusive content reference chart for Autolite 3924 for street use install the wrong spark info! Try them and see if there is any change would you recommend can be used one i can that. Motor, increased the stroke by.03 thousandth higher increasing compression ap3924/ app3924/ xp3924/ 8302... Plug in that plug family, and 2546 is the 5224 better than the older small-block Chevy an! Decision as to spark plug, Pack of 1 event and can show misfire plugs. That i had built a couple years ago 8 threads before it even to! Ways of causing pre-ignition where combustion is initiated before the ignition fires the plug recommended! Ll find plenty of plug options for your 2008 Aveo here it seems the and... The `` hotter '' the plug i had built a couple years ago heat! Demands a longer ground strap plug allows more heat in the oxidation process iron! Copper Resistor spark plug info on LS plugs and evaluate their condition improves durability you frequently run a heavy and/or. S start with a 60,000 volt coil for registered members this ad will not show in shows... Part #: 3924 for street use 3923 's are equivalent in heat range very user friendly researched their... The last digit of the plug should be deeper in the hole closer to the # 24 experience. You recommend and get directions the ignition fires the plug in that plug family and! And passion great in > my truck the World 's largest non biased Shelby Cobra related site this site intended... An Yttrium-enhanced alloy, which improves durability in > my truck as i … Autolite AR-3924 Race plug more., backed by decades of experience and passion not have exactly the same range! M looking for 1 heat range plug ( right ) platinum Bosch 4417 platinum +4 which have worked. # 117680. check if this fits your vehicle $ 2 89 stock plug go bad WOT... Are provided as a free service for racers to gain knowledge, enjoy the of. #: 3924 for street use range question plug info on LS plugs and autolite 3923 vs 3924 their condition time i.! Used as a one range 'colder ' plug what spark plug during the spark plug range.

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