Dinan Free Flow Axle-Back Exhaust for BMW | E6X | 645Ci | N62 - (NLA)

Part# D660-0002

Dinan's Free Flow Exhaust for 645 models provides improved flow and the resulting power gains without the excessive noise and ''boominess'' associated with typical after-market mufflers. The mufflers feature ridged and durable cases, manufactured from 100% 20 gauge-304 stainless steel inside and out for optimum resistance to corrosion. Internally, the systems feature Dinan's Tuned Resonance Chamber Technology, providing the optimum balance between maximum power gains and a civilized, yet sporty exhaust note. 3.5 inch diameter polished stainless tips give the cars a tasteful performance look as well.


  • +6 HP @ 6600 RPM, +5 lb/ft @ 6600 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
  • 3.5" laser engraved polished stainless steel exhaust tips

Installation Instructions: Dinan E6X 645Ci Axle-Back Exhaust D660-0002 Instructions


  • 2004-2005 E63 / E64 BMW 645Ci - N62 4.4L

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