The Weapon R down pipe replaces your undersized factory down pipe in favor of a full 76mm (3") down pipe. The Weapon R down pipe is one of the largest on the market. Made of 304 Stainless steel it features CNC machine mandrel bending which clears the factory lower arm bars. TIG welded, with the ever important CNC machined upper flange that is critical for proper seating of the exhaust flanges.