Our most aggressive exhaust system we offer for the Scion FR-S & Subaru BRZ is the Revolution RS. It features full 3” diameter piping for superior performance. The purposeful single-sided cat-back layout exits the left side of the vehicle and produces an effective but light-weight system. The extra large GReddy resonator controls unwanted drone. Like all GReddy Revolution RS systems the fully hand-welded 304 Stainless-Steel exhaust carries a limited lifetime warranty.