Sport Catalyzer Exhaust Manifolds for my ZC31s .. It is a 200 cpi metallic Catalytic convertor. It has not caused a engine check light. It did improve performance. However if you had bought this NEW you'd be disappointed with the power to Price. I bought this second hand so it was worth it. I still have the second CAT in place and that is probably severely restricting power and as such if that was replaced with a higher flow CAT then bigger gains would probably be achieved.
www.rsrs.jp/en/engine/catalyt...
www.timeattack.it/store/sport-...