Unsilenced version of 831003, designed to offer a more aggressive sound, with a very deep tone at low-mid rpm and louder burble and pops. The diameter is 60mm external. The inlet is 60mm internal to match the Supersprint front section. The outlet is 60mm external diameter to match the Supersprint rear exhaust.

Note: because of the design of the OEM exhaust system to remove the centre silencer, very long, it's necessary to fit 831022 + 831012 + 831013 together.
The outlet fo this centre pipe is sized to match 831026, in case you want to fit it with the stock Cooper S or JCW (both mk1 and mk2/factory/step2) please request a diameter reduction to 55mm external diameter.

It's necessary to cut the OEM system where there reference spots are, and use the OEM BMW Mini clamp part number 18307560778 The coupling of the Supersprint centre section with the OEM rear mufflers may require specific adaptors, even in the case when it's not specified that the part requires to be fitted as a kit with others.

The cause may be a different diameter, anyway the coupling may require a connecting sleeve.
Such adaptors must be requested at the moment of the order, ask our experts about the price and measures

To be installed as a kit with 831011 and 831032 or 831012