Genuine BMW M Performance Back Box for the BMW F20 and F21 M140i. This is a very popular addition to the M140i for bringing out the best of the B58 sound.

As this back-box is non-valved, a valve delete plug is included as well as a clamp. Some production years of M140i included a join at the backbox which this exhaust will fit straight to, single piece exhaust versions will require a cut to be made.

Exhaust tips not included – choose between polished or carbon fibre seperately.