spark plugs

[John Stuttle]

I just put a new set of stock Champion RC12LYC's in mine. What a difference. Took all of 30 minutes, not bad for a Senior Tuner! At only 99 cents each you can replace them monthly if you want to! --WOW - john

 

[Vip-RT10]

If you are running stock engine with only smooth tubes and filters, run the Champion RC12LYC. The gapping that JonB suggested to me was from 0.038 to 0.040, while the stock gap is 0.035

 

[SteveBCloud9]

How about a slightly modified engine; tubes, headers and pipes?

 

[Vip-RT10]

SteveB...i think it is the same.....as long as you don't have NOS then you'd need a cooler plug.....Doug Levin knows about this, not me....

 

[RockyTop]

Consensus here for non-modified and many modified cars, stick with the stock plug (longer nose or something like that). Check your shop manual for the gap.