DOES NOT NOT FIT DIRECTLY ON US SPEC CARS These manifolds were designed for the EURO M3 and wont line up with any US spec mid pipe. These were modified by removing brackets and plugging holes on top with grade 8 bolts and red Loctite.
Previously mocked up on an engine, where PO used a bolt and nut through the mid pipe flanges rather than the correct sized bolt threaded into the flange, so the threads in the flanges show some damage. PO stated he only installed them on the car but it never ran.