I have a headpipe with a magna flow cat and o2 sensor that I am selling for $200.00 plus shipping. I paid $600.00 to have it made. I had a 98 328i M52 engine in my E30. Should work for M50/M52/S50/S52 cars with cast iron or stainless manifolds. Bolts directly to E36 muffler assembly. I have pics of it on and off the car. Located in California. email me if your interested. ajewelinthejunk@gmail.com