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B58 Racing
Active Autowerke Valved Axle-Back Exhaust - M340i / M440i (G2X), photo 1 of 5
Active Autowerke

Active Autowerke Valved Axle-Back Exhaust - M340i / M440i (G2X)

From$1,999.00 Available

Ships from the brand or distributor, usually in 3–7 business days

Make sure this fits your car

Fits: BMW M340i (G20) and M440i (G22)

Tips: Select one
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  • Shipping at real carrier rates
  • 30-day returns on unused parts
  • Fitment help before you buy
Questions about fitment?Email a B58 tech with your VIN, and we'll confirm before you order.

The M340i and M440i are quiet from the factory. Active Autowerke's valved axle-back replaces the rear section to give them a sound more fitting for the car, and it reuses the factory valve actuator so you keep the stock valve control.

What you get

  • Valved axle-back replacing the factory rear exhaust.
  • Reuses the BMW valve actuator for factory-style valve operation.
  • Louder, fuller tone than the stock exhaust.
  • Four tip finishes: stainless brushed, matte black, carbon fiber, or carbon over black.

Guides for this part

Best B58 Mods, In the Order to Do Them

Start with a tune. It is the biggest gain per dollar on any B58. Then add a downpipe and a Stage 2 map, then an upgraded high-pressure fuel pump (HPFP) and an ethanol blend. Only after that should you think about a bigge

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