The Pettit Racing RX7 exhaust midpipe is only available in a Non-Resonated straight through configuration or with a 3" high flow catalytic converter.................... 

All Pettit Racing exhaust parts are constructed from 3" T304 Stainless Steel with HD 1/2" (13mm) thick flanges that won't easily bend causing leaks. This is a modular part and works with the OEM pre-cat and most aftermarket downpipes.