Dinan's Free Flow Axle-Back Exhaust for the 540i provides power gains without the excessive noise associated with typical ''performance'' mufflers. The Dinan exhausts feature rigid and durable muffler cases manufactured from 20 gauge 304 stainless steel for optimum corrosion resistance. 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. The Dinan exhausts also provide substantial weight reduction compared to the stock mufflers. The mufflers weigh in at 18.5 lbs. compared to the stock systems at 34 lbs. Dual 3-inch diameter polished stainless steel exhaust tips give the cars a tasteful performance look as well.
Features:
More Power: + 7 HP @ 6500 RPM + 6 LB-FT @ 6500 RPM (w/ software)
Drone abatement technologies used to reduce cabin resonance
Enjoyably louder, sportier sound
Dual 3" polished and laser engraved exhaust tips
Over 15 lbs. lighter than stock (18.5 lbs. vs. 34 lbs.)
100% 304 stainless steel construction
Uses the factory brackets and hangers for a factory-like fitment
Specs
Brand
Dinan
Dinan Point Value
3
Emission Code
5
Height
11
Labor Time (Hours)
1.5
Length
48
Material
304 Stainless Steel
Max HP Gain
7 @ 6500 RPM
Max Torque (lb-ft) Gain
6 @ 6500 RPM
Product Type
Axle-Back Exhaust
Sound Level
Aggressive / Moderate
System Type
Axle-back
Weight
37.5
Width
30
Part Number
D660-3940
Emissions
5
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.
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