Evo 8/9 turbo O2 housing with external wastegate dump. Made from T304 stainless steel and of course backed with our Lifetime warranty, all tig welded in house. Designed to mate to your factory turbo, or aftermarket turbo using the factory turbine frame. This O2 dump is perfect for getting the additional flow needed for the utmost in top end performance. And with the external dump of the wastegate exhaust gasses, there is reduced turbulence in the down pipe allowing for a smoother flow and greater hp gains. The wastegate exhaust exits up through the factory hood vent.