Dinan Free Flow Axle-Back Exhaust - 2001-2006 BMW M3

Stainless Steel - Black Tips - E46

Part # D660-4604 Be the first to write a review
Estimated shipping date: 11/01/2021
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If you've been searching for a truly high-performance Axle-Back exhaust for your M3 look no further. Dinan's unique muffler design effectively reduces back-pressure for improved flow, resulting in measurable power gains. Manufactured from 304 stainless steel inside and out for superior resistance to corrosion as well as a significant reduction of weight. And from those aggressive-looking ceramic-coated tips flows an exhaust note that will be music to the driving enthusiast's ears. The Dinan exhaust delivers exactly what the M3 owner demands in a performance muffler; increased power, reduced weight, a look that means business and the throaty exhaust note you'd expect from an M3.


  • More Power: + 7 HP @ 8000 RPM + 5 LB-FT @ 5000 RPM (w/ software)
  • Drone abatement technologies used to reduce cabin resonance
  • Enjoyably louder, sportier sound
  • Quad 3" black ceramic coated and laser engraved exhaust tips
  • 15 lbs. lighter than stock (43 lbs. vs. 58 lbs.)
  • 100% 304 stainless steel construction
  • Uses the factory brackets and hangers for a factory-like fitment
Brand Dinan
Dinan Point Value3
Emission Code5
Labor Time (Hours)1.1
Max HP Gain7 @ 8000 RPM
Max Torque (lb-ft) Gain5 @ 5000 RPM
Product TypeAxle-Back Exhaust
Part NumberD660-4604

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Stage 2 Engine Software recommended for optimum performance and drivability.

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    Some parts are not legal for use in California or other states with similar regulations.