Dinan Free Flow Axle-Back Exhaust for BMW | E39 | 525i/528i/530i (w/ M-Tech Bumper) (NLA)

Part# D660-3948

The Dinan sport muffler is designed to compliment the 5-Series and not overpower the driver and passengers with harsh tones. Dinan engineers their exhausts to sound great and be a natural fit to the character of the car as well as produce more power and torque. A single 3.5" oval stainless tip engraved with the Dinan logo fill out the rear valence. Annoying highway drone has also been engineered out of the system. Dinan uses only 304 stainless steel in their systems for the maximum corrosion protection. This system replaces the factory rear mufflers at a pre-determined cut point on the stock exhaust, which makes for an easy installation and you can reinstall your original mufflers using factory hardware. Detailed installation instructions are included.

Note: Not applicable for wagon models.


  • +5 HP @ 6500 RPM, +4 lb/ft @ 6500 RPM
  • Uses the factory brackets and hangers for a factory-like fitment
  • Weight Savings
  • Dinan's Tuned Resonance Chamber Technology
  • 100% 304 stainless steel construction
  • Single Oval laser engraved polished stainless steel exhaust tip

Installation Instructions: Dinan E39 5-Series Axle-Back Exhaust D660-3948 Instructions


  • 1997-2003 E39 BMW 525i / 528i / 530i with M-Technic rear bumper - M54 2.5L / M52 2.8L / M54 3.0L


Can't find what you're looking for?
Odds are we can get it! Click Here Now