Pypes 05-09 Mustang GT Stainless Steel Offroad H-Pipe
If you want something besides the off road X-pipe here is a good choice. This is a direct bolt in STAINLESS steel off road H-pipe that has dyno proven horsepower gains.
This Stainless Steel mandrel bent offroad H-Pipe will bolt right up whether you have a 5 speed manual or automatic transmission. You'll be most impressed by not only the sound of this H but the performance gains as well. Dyno testing showed gains of 8rwhp and 10ft lbs of torque at only 5000rpms.
Covered by a 1 year Pypes warranty against defects you can't go wrong.