Quote:
Originally Posted by Wills2
Yeah the M1 e28/34/30/36 all had single twin exhausts the quads came in from e39/46 onwards if I recall correctly.
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The E46/E39 cemented the ///M quad exhaust setup but it started showing up on the then flagship E31 8 series Ci and CSi models during the late 90s. Then the E367/8 Z3 ///Ms got them. But those were lower volume cars. Once the E46 M3 got them in 2000 there was no looking back and that became the signature setup for any ///M.