It sounds like it depends on how built the motor is. If you are running a stock ls1, then you will probably won't see any gains.
Does this sound correct?
It also sounds a bit more difficult to do the swap to a 98 than the 99 and newer. Unfortunately I have a 98
Last edited by Foozbird; 06-13-2013 at 02:46 PM.
Reason: something else came to mind