Rear muffler delete without Valvetronic-System. Stainless steel tip with outer Carbon cover, color Chrom/ Aluminum silver anodized . Slip-On rear muffler (exhaust clamps). For install of the Eisenmann Slip-On rear muffler the stock exhaust system has to be cut. Please read the instructions carefully before starting the installation. Part fit cars with and without Gasoline Particulate Filter (GPF). On cars with Gasoline Particulate Filter (GPF) re-mapping of the ECU is necessary to avoid OBD error and DRIVETRAIN malfunction.