If you've dealt with sourcing turbo manifold gaskets before, you know that there are a lot of different options at a lot of different price points. Unfortunately, a gasket with stainless, multi-layer construction and guaranteed quality is nearly impossible to find. Until now. At GrimmSpeed™, they have worked with endless amounts of aftermarket gaskets, none seem to work as well as the multi-layer steel gaskets. The issue with the most T4 gaskets is that even if they're multi-layer, they're not completely constructed of Stainless Steel which leads to leaks. Well Grimmspeed™ has your answer, a premium multi-layer stainless steel w/ stainless steel fire-ring gasket at a great price. Another thing that you'll notice is that they've opened up the bolt holes to 11.8mm to ensure that you've got flexibility, even with custom made turbo flanges or larger bolts.