BBK 1633 1-3/4" Long Tube Full Length High Flow Performance Exhaust Headers For Mustang GT - Chrome Finish BBK is your Number One Aftermarket Performance Exhaust Brand in the USA - American Designed and Built BBK Exhaust is Built with CNC Mandrel 1-3/4"" Bent Tubing for 35% Increased Flow Over Stock to Increase Horsepower, Torque and Performance Aircraft Quality Construction, Heavy Gauge 1-3/4" Tubing, 3/8" Laser Cut Flanges, Large Bore Patented Designed Collectors and Custom Precision Hand and Robotic Welds for Long Lasting Quality Long Tube, Full Length Direct "Perfect" Fit Replacement Exhaust Includes All New Gaskets and Hardware (Where Applicable) and Offers Improved Performance and Sound Over Restrictive Stock Systems Chrome Finish - Designed to Fit All 2011-2014 Ford Mustang 5.0 Applications (5 Speed and Automatic) Requires Matching Short Mid H or X Pipe to Complete InstAllation