Who's gonna be the 1st try Eisenman F8X GT4 rear section replacement race pipes on their M2C ?
Or for "warranty friendly" option
keep it OEM and make BMW's own GT4 system fit an M2C....
https://f80.bimmerpost.com/forums/sh....php?t=1451451
Parts perhaps for just rear section only - photo below
* 18118431005 - Rr. Pipe (Lt.)
* 18218431006 - “ (Rt.)
* 18118431004 - “ Reinforcement brace
* 18218431007 - Pipe Clamps (x2)
* 22326760945 - Hex Bolt w/ Washer (x2)
BP