If you are looking for the ultimate Cat-Back for your WRX or STi, look no more. The addition of a GHL Cat Back Exhaust upgrade will provide a deeper, throatier performance sound without the uncomfortable resonation associated with many performance systems on the market. Throttle and boost response, and overall performance is noticeably improved due to GHL's free flowing design. At a weight of only 24.5 lbs, it will shave a few extra pounds off of your vehicle weight, and the fully polished stainless system with a 4 inch slash tip looks good too. The GHL 3 inch aircraft grade T-304 stainless steel is all mandrel bent, includes all necessary clamps and gasket. SWRXCB3