Large diameter, 3-inch stainless steel construction replaces stock intermediate pipe and muffler, resulting in enhanced exhaust sound and performance. Manufactured for Subaru of America by Bosal.(Rear Differential Protector and Trailer Hitch may not be installed in conjunction with WRX Performance Exhaust System installation.)Fits the WRX and STi. Same exhausts that comes in the ESX 65hp Kits.