The Agency Power dual catback exhaust for the Subaru BRZ/Scion FR-S features 2.5" 304 stainless steel piping, tig welded mandrel bends and a satin finish. The dual 4" titanium tips are the perfect finish to this exhaust. The design utilizes factory mounts to ensure easy installation. The 2.5" midpipe ensures great flow and horsepower gains across the board. As with all Agency power exhausts you can expect quality, durability and performance.