Full copper core electrode with necked down tip for improved ignitibility provides better performance in all conditions
Cold-formed steel shell and precision rolled threads, with anti-corrosive nickel plated shell
Gas-tight seal (100 percent leak-proof) and reduced RFI (radio frequency interference)
One-piece terminal post for added strength and multi-rib insulator reduces danger of "flash-over"
Copper-glass, resistive seal bonds insulator, terminal post, and center electrode together ensures full required voltage at spark gap
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Autolite Copper Core spark plugs are your industry standard, guaranteed to deliver quick starts, good fuel economy, and smooth acceleration. 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.
Most Helpful Customer Reviews
Highly recommend these quality plugs to any Harley owner, but then again I'm a Ford guy so Autolite is a household name. For some reason these plugs feel nicer to me than NGKs or Champions, but I could be biased. I think plug brand comes down to personal preference, like auto manufacturer. Should note that these require an 11/16 plug socket, not the typical 5/8.
I'm an Autolite guy (kind of like being a Chevy or Ford guy) and always will be. They always perform well in every situation unless some issue is causing them to fail. I got these for my street bike that gets some pretty good use year round - I've run NGK before and have had no problems but Autolites always run great in all my cars, hence my bias.
Gap was almost spot on 0.040" and the washers and diode threaded on easily. Makes Black Betty run like a bat out of hell...
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