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Your cart is empty.Autolite Racing Spark Plugs are used by many professional race car drivers. These spark plugs contain an Yttrium-Enhanced Alloy, which enables up to 8 percent reduction in side wire temperature for improved durability and less pre-ignition. Autolite racing plugs are available in colder heat ranges than most plug manufacturers to support modified engines and feature a cut background electrode for improved ignitibility and faster flame kernel growth. They are also nickel plated for a long-lasting, corrosion-resistant finish. Since its inception, the Autolite brand has provided the automotive aftermarket and Original Equipment manufacturers the highest quality ignition products. Autolite has been in operation for over 100 years and has produced more than 11 billion spark plugs and glow plugs. These plugs are specifically designed for each application to meet or exceed OE quality and performance. Autolite makes plugs for Japanese, European, and Korean cars as well as plugs for Lawn & Garden and Power Sports. As a leading supplier of spark plugs, the Autolite brand has the right ignition products for your application, regardless of make or model, import or domestic.
Andrew M.
2025-08-31 14:26:10
the part is good
David Warren
2025-07-28 17:43:59
I only have experience with the plug's characteristics in what would be considered 212cc - 264cc open-class motors. Qualifiers would be an aftermarket ignition, .360 or greater valvetrain lift, compression, and ignition timing requiring 100 or better octane, a big valve ported head, and big jets on a big carb.These big-build configurations show a noticeable torque increase across the entire RPM range with the AR3910X plug. The power is diminished if I swap out this plug for an AR3910 or any other transistor plug. I tested a dozen or so spark plugs.I do live in coastal central Florida. So there are times these motors are burning more water than air. You may have different results if you live in a more favorable PA/DA climate.
Adam K
2025-06-29 13:15:23
Way better pricing for the same thing from other sites. I see gps selling them for $10/each! You get basically 2 free extra by buying this 4 pack!
Micheal D. Prater
2025-06-08 20:18:39
If you race clone motors in go karts and change the spark plug Weekly this is flat out the best deal you’re gonna find.
RENE A MADRID
2025-05-15 17:38:54
Fots great and works perfectly!!
jonathan schlue
2025-04-24 11:43:28
Great
ECONO CAR
2025-04-17 10:34:38
GREAT PRICE
Kevin
2025-04-13 12:26:16
All was good
Javier
2025-03-14 18:28:22
Se las puse a mis dos mini bike COLEMAN una con motor 196cc y otra con 212cc... Jalan demasiado bien... Muy recomendables.
J a.
2025-03-02 13:30:01
Used on racing kart. Solid. No complaints
Amwwazon Customerwayne waddell
2025-02-09 12:34:36
Hard to find at half the price , use in my Coleman CT 200 eux mini bike, stage 3 kit installed
nickael7
2024-12-07 12:00:51
Burns thoroughly the mixture inside the combustion engine of racing short blocks.
Adam T.
2024-11-18 19:48:14
Great plug for a great price , delivered
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