PPE Engineering 1ZZ Race Header & High Flow Catalytic Mid-pipe combo eliminates the 2 OEM pre-catalytic converters for your Toyota MR2 Spyder, MR-S, Roadster (ZZW30) replacing the main cat and mid-pipe with a performance oriented high-flow part. Suitable for off-road use only. PPE Headers have a significant increase in flow compared to the stock manifolds. Completely TIG welded construction with thick 16 gauge tubing for long lasting power gains.