Hey Brad care to comment on how long you ran the UDP before you put on the SC? You lost bearings correct? I have to say no the SC will not kill it, at least not that quickly. Yes anything you do to increase HP on your car is fundamentally bad for the engine. The engine was designed as a passenger car engine, then SVT engineer guru's (TH included) went nutz on it. The factor of extra horsepower that is available in the engine is unknown to me personally, but I have heard that 350 on stock components is not too bad.