The engine was designed around a certain sparkplug.. ANY other plugs that CLAIM they fit are only copies of the original.
The hotter and so forth claims are just horrible when you know what it is plugs actually do.
All it takes is s small yellow spark to ignite the fire.. after that small yellow one all others are just fireing into already burnt gasses!
Hotter...longer..or whatever don't do any better.
RACE engines running higher compression and more rpm cannot run on the stock coils.. So THEY must have a stronger spark. That same system does NOTHING for our lil Jeep engines.. Keep it stock and you cannot go wrong.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />