I have the BMR parts (go to
http://www.bmrfabrication.com/F5.htm ) and it has made a huge difference in how the car launches. It was done as part of a tech article in the current GM High Tech magazine where you can see a side-by-side comparison with the stock part. The car's launch changed drastically, I never had issues with wheel hop but when it spun the car would head towards the wall. Now the car goes straight and launches much harder. Stock tires I run low 1.80 short times and on drag radials I hit low 1.70s. The car only has a converter and headers and runs 12.40s at 111 mph.