BM4.01.XR90

Central pipe + 2 KAT 100 CPSI (it replaces the originals catalysts)

(For the installation on the original rear silencer it is necessary to separately order the adapter AD.BMWM4.01)

Rear silencer with end pipe 2x diam. 90 X-RACE Black Edition R+L + Valves assembly with original electric engines (electric engines not included)