This kit includes a stainless super V-band clamp and two v-band flanges. These are available in both 2.50″ and 3.00″ sizes. Inside diameter of the flange in this kit measures 2.50″ and ouside diameter at the largest point measures 92mm (same OD as the 3″ version). Please ensure you measure the v-band flange on your turbo exhust housing to ensure compatibility before ordering!