[Blown330]

Think about this: The Chevy guys that I know of who are among the fastest trucks with these kits didn't keep them. When it came to really turning up the wick the STS systems got ditched for either an underhood turbo or a big twin-screw Maggie. Even on trucks were aftermarket tuning is well supported the systems could be troublesome to tune with weather changes. Also, who wants a system where 5 minutes with a cordless impact driver nets someone a new turbo? The only advantages the STS kits have is simplicity and cost compared to a typical supercharger kit. When it comes to upgrading they quickly start showing a weakness.