Quick question to all savvy E9ers. Are the Group 5 CSL upright mounted M49 3.5 headers same as the M88/1? Did BMW use the same exhaust headers for their mid engine M1?
I'm comparing M88/1 headers found in M1 cars (not the M88/3) with the late M49 upright mount engine headers and not the earlier slight slanted M49. I have located a set for the M88/1 in Germany and the seller is claiming they are the same as the late M49 headers.
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