Rc10ecc spark plugs

[viperB]

I just picked up 300 Champion spark plugs Rc10ecc. They are 2 steps colder then the stock Rc12ecc. They work great with Vipers that are supercharged, Turbo, Nos or has heads and cam. PM me with you need a set, thanks.

 

[CWhiteRun]

They have extended plugs, which I have been told are NOT optimal for boosted or nitrous cars.