5500 or 6000?????? i mean, my freidn revs his ls with b18 with b16 pistons to 7500.


is your motor even tuned? if your itr head actually has the itr valve train, then you can rev higher, but i think your week point are the ls rods. ls rods arent very strong( acutally i think its the rod bolts).

just don't get up on it at all till you get it tuned. once you get it tuned, let whoever tunes it tell ou what you can rev to, ect.