It picked up about 10 MPH in an 800 foot run (the distance from my driveway to Walker Valley Rd.) and is on par with a CAI/CB Cobra. My Snake used to hit 80 in that same distance before I pullied up and that's what the GSX hit. I managed to smoke the clutch testing it however. We're getting an XTD Stage 4 with an 11 Lb. flywheel for it next week. After the breakin and some practice launches, we'll be ready to play a bit. I don't think we're gonna turn up the boost until after we put ARP head studs and Cometic head gaskets on it. We'll probably go with some cams then as well. I figure the GSX picked up 20+ WHP with the new sensors and tune considering the O2 sensor was completely fried before..