For Garrett exhaust housings with 78mm inner diameter, stainless steel, perfect fitment. Downpipe V-Band Ring for Garrett GT30 / GT35 For Garrett VBand turbine housings with 78mm inner diameter groove Stainless steel, perfect fitment V-band downpipe flange for all Garret GT30 / GT35 exhaust housings with V-Band discharge and 78mm inner groove. The tongue does has an outer diameter of 78mm and fits perfectly in the groove of the v-band exhaust housing. E.g. fits for many Garrett T3 twinscroll housings. Important: There are 2 versions of this rings availble. 78mm and 81mm. Please messure your housing beforder placing your order.