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Active Autowerke Signature Exhaust Generation 1 | BMW E87 (135i)

Active Autowerke Signature Exhaust Generation 1 | BMW E87 (135i)



Product Info

Active Autowerke BMW 135i Signature Exhaust

The BMW 135i was meant to be a compact, sporty, entry-level offering from one of the most exciting vehicle manufacturers in the world. Needless to say, it accomplished this mission with aplomb. Boasting an underrated 300 BHP from either of its turbocharged, direct-injected engines, the 135i was no slouch, but without a proper exhaust note, the driving experience left something to be desired.

That’s where Active Autowerke’s Signature Exhaust for the BMW 135i comes in.

Our stainless-steel 3.5-inch rear exhaust section adds an aggressive but pleasing tone to either N54 or N55 equipped models. Of course, it also perfectly compliments the Active Autowerke Signature BMW 135i Downpipe, allowing for even more horsepower and torque.


  • Full 304 stainless steel with high-polish finish
  • 50" Mandrel bent piping for optimum exhaust flow
  • NCC (Noise Cancelling Chamber) to reduce drone
  • Staggered 80mm Active Autowerke Signature tips
  • 5-7 horsepower increase measured at the rear wheels on our in-house dyno
  • Weight savings over factory muffler
  • Designed to use existing factory mounts and hardware
  • Fully adjustable mounting positions
  • True bolt-on system

More Power & Better Sound: BMW 135i Signature Exhaust Benefits

  • Active Autowerke performed months of extensive testing on the factory BMW 135i exhaust. We used various pipe diameters and lengths in order to determine which would optimize performance, while maintaining a high level of quality, and factory-like fitment.

    Our engineering team found that a 3.5” diameter allowed for a free-flowing design that could still utilize the factory mounting positions.

    As a result of this increase in size over the OEM piping, backpressure is reduced. What this means for BMW 135i owners is quicker turbo spool and a surge in power you can feel from the driver’s seat. Owners can feel confident they are adding verified horsepower and torque across the RPM range; on Active Autowerke’s in-house dyno, an otherwise stock 135i showed increases between 5 – 7 horsepower at the rear wheels with our Signature exhaust installed.

    A common complaint in the 135i community is the drone seemingly inherent in most performance exhausts. Active Autowerke heard these criticisms, and decided to do something about it.

    Our engineering team designed and implemented our Noise Cancelling Chamber (NCC) to assist in reducing exhaust drone. The system is capped off with dual staggered 80MM tips that lend a handsome, but eye-catching look to the rear end. Now owners don’t have to compromise between performance and comfort; the Active Autowerke BMW 135i Signature exhaust provides both!

    Active Autowerke’s goal was to design an easy to install, true bolt-on solution for 135i owners interested in customizing their cars. Step by step instructions are included with every shipment, helping show the fully-adjustable mounting positions of the system, which makes use of the BMW factory hardware.


    • E82 135 (N54)
    • E82 135 (N55)