So just ordered my Stillen SC

mikey1600

Stillen will flat out say not to do it obviously to cover themselves, even to get the 9lb pulley you have to sign a waiver and in the description it says using this pulley with stock tune or stock stillen tune could result in catastrophic engine failure without getting a custom tune, I mean of course it will if you are red lining the thing with a not designed tune for the increased boost.

after people who have done so if possible