Dinan's Free Flow Axle-Back exhaust system features 100% stainless steel construction measured to exact specifications to ensure proper fit via factory hangers and mounting points. Dyno tuned for maximum exhaust flow with minimum backpressure, this system is designed to provide a more aggressive sound under acceleration while reducing drone inside the vehicle, thanks to Dinan's exclusive Helmholtz Chamber and Butterfly Valve technologies. The exhaust gasses exit through larger laser engraved ultra durable polished, or ceramic black, quad tips.
Every Dinan product comes with our industry-exclusive factory matching new car bumper to bumper warranty and is designed and tested in Morgan Hill, California and can be purchased and installed at any Dinan Approved BMW dealership nationwide.
Features:
More Power: +8 HP
Helmholtz chamber and butterfly valve technology incorporated to remove drone
"Straight through" canister design
Enjoyably louder, throatier and deep sound
Quad 3.5" black ceramic coated, or polished stainless, laser engraved exhaust tips
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)
1.9
Length
48
Material
304 Stainless Steel
Max HP Gain
8
Product Type
Axle-Back Exhaust
Sound Level
Moderate / Aggressive
System Type
Axle-back
Weight
62.7
Width
30
Part Number
D660-0044-BLK
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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