This was used on my gt500 for a little over a month. I swapped the tunes back when I traded the car in. It's ready for its new home. Justin @ VMP tuned my car on 5-5-08 to 547RWHP 548RHTQ (2.6 upper,c&L intake,JBA offroad Xpipe) $300 shipped OBO Matt 2813309066