BMW's 1 Series M Coupé

Updated 10 October 2011 at 16:32 GMT

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BMW's 1 Series M Coupé gets new performance exhaust from Milltek Sport

Finally bitten the bullet and had primary cat back Milltek exhaust fitted. Exhaust is only slightly louder than stock, nicely bassy at low revs, nice howl at higher revs. Main thing I changed the exhaust for…no drone. Used to suffer nasty in cabin drone at 2300-2800 revs, now long journeys are a real pleasure instead of having to keep the revs above or below the drone band.

BMW M-division's latest high-performance vehicle, the 1 Series M Coupé, has passed Milltek's rigorous exhaust system development and testing program and as once again returned proven power gains.

Milltek’s development 1 Series M Coupé arrived having already had a very mild-stage 1 ecu remap. After a week’s fettling by Milltek’s technicians, the car was taken to MRC Tuning (one of Milltek’s premiere UK dealers) to make use of their Dyno facilities.

With just the mild-stage 1 remap and standard exhaust system, the car was dyno-tested at 355bhp / 600Nm (it leaves BMW’s factory in Munich with 340bhp and 450Nm).

The 1M then went up on the ramps for MRC Tuning to fit the new Milltek secondary cat-back exhaust system – a straight-forward job as the Milltek engineers did a great job at making the new system super-easy to fit. The car went back on the dyno and showed an impressive 5bhp / 5Nm gain (so 360bhp and 605Nm overall).

The final task was to fit and dyno test the car with the full primary cat-back system which removes the cars’ secondary catalysts. Even bigger power gains and better throttle response were expected and the final figures didn’t disappoint – 371bhp and 616Nm – which equates to a very impressive 16bhp power increase and an extra 16Nm or torque to play with!

We’ll have some video and further information here shortly…

Milltek would like to say a big thanks to MRC Tuning for their help in the testing of the new exhaust system.