Circuit Werks latest Nissan 240sx S13 / S14 fits all 1989-1998 240sx with any motors which includes KA, CA, & SR. Could use with stock exhaust or any other aftermarket exhaust Turbo or N/A (non-turbo) applications. This is a 3" test pipe. Dual bolt gaskets included along with hardware and allen key. This will not pass smog in most states. Our test pipes only weighs 3 lbs and fully high polished stainless steel. Just like your OEM Cats, ours uses a stamped OEM style flanges.