BBK 1507 2-1/2" High Flow Performance Off-Road H Pipe for Ford Mustang 5.0L BBK is your Number One Aftermarket Performance Exhaust Brand in the USA - American Designed and Built BBK Exhaust is Built with CNC Mandrel Bent Tubing for 35% Increased Flow Over Stock to Increase Horsepower, Torque and Performance 2.5 Inch Full Length Hi Flow Off Road Race Only H Pipe Fits all Stock and Aftermarket Shorty Exhaust Headers Bolt on Additional 12-20 Horsepower and More Aggressive Sound, OEM Style Dome Connections for Easy Fitment These BBK Hi Flow Exhaust Pipes Fit all 1986-1993 Ford Mustang 5.0 Applications - Aluminized Steel