Active Autowerke G80/G82 M3/M4 Signature Equal Length mid-pipe (US Patent 11248511, UK and EU patent 3882441) with G-brace $2,637.00 Edit All available Active Autowerke G80/G82 M3/M4 Signature Equal Length mid-pipe (US Patent 11248511, UK and EU patent 3882441) with G-brace are in your cart. Total $2,637.00 Remove