I had to cut my exhaust to remove the rear sub frame over the weekend after I had everything installed except the exhaust I drove around the block holey crap it was loud, it was cut right at the ebrak adjuster, no carpet in the car, rust repair going on. I am sure it would be different if it went all the way to the back.

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1976 240D
1976 240D parts car
1970 220D daily driver