Integrated Engineering GT35R Turbo Adaptor Ring for Cast Turbo Inlet PipeIf you are upgrading your Audi B9 S4, S5, or SQ5 3. 0T turbocharged engine with a hybrid turbo, you will need to address the larger inlet size on the new turbo. This billet o ring sealed flange adapts your IE Turbo Inlet Pipe to a GT35R hybrid sized turbo with a 66mm inlet. This easy adapter ring makes your hybrid turbo a bolt on install, keeping your IE intake and turbo inlet perfectly in place without any modifications. Only compatible with