Firebrand FB-10-1065 Grand Prix 2-1 Exhaust Stainless Steel w/Black End Cap for Softail 18-Up Models Non-240 Rear TyreFirebrand has created the next level in high performance exhaust for the M8 Softail! Merging a full flow stainless header into a highly engineered collector and culminating in a 4. 5in. muffler, the new Grand Prix 2: 1 system is the perfect combination of style and power.* Increased power and torque * Stainless steel stepped header * Includes adapters that allow use of wide band or stock O2 sensors & includes all hardware * Throaty 2: 1 exhaust note *