you know, I drove untuned powerfc for 2 years now, I doubt that is the reason why your motor blewStricNyne wrote:i had the opposite... i think its wut blew my motor, its pretuned for i believe 100 oct, when i got mine on STOCK boost, and stock fpr, the knock sensor on the cmdr would be offf the chain, i had to retard the timing to all hell made my rb25 drive like turd. but still congrats !!!