Assassin

iTrader: (3)

I've got some full of **** generic plugs in right now cause they didnt have the tr6's in at the time, and I've got about 3 deg. of knock at high rpm in the lower gears, I know alot of other causes for knock but could this be one???, thanks

Assassin

iTrader: (3)

buttt

wrencher

iTrader: (2)

Could be, dont think many put cheap plugs in though.

Texas Terminator

maybe if they are too hot.

NoGo

iTrader: (2)

If the plugs are too hot or of a poor design then yes. If you run a higher than stock compression than defiantly yes.