Dinan engineers designed the BMW 328i/428i exhaust to improve exhaust flow by reducing back pressure. resulting in increased power output and a great sporty sound that is civilized when you want it to be, and pleasantly aggressive under hard acceleration. Like all Dinan exhausts our 328i/428i Free Flow Axle-Back Exhaust is engineered to reduce low-RPM drone so the cabin of the vehicle is still intimate and not drowned in an excessively loud tone.
The system is built with ease in mind and utilizes a simple bolt-on installation with included mounting hardware. It is made from 100% 16 gauge 304 stainless steel and will resist corrosion for years to come. The design features twin 70 mm ceramic black or polished and laser engraved exhaust tips for a tasteful high-performance look that yields a maximum performance gain of 4 horsepower and 3 ft-lbs of torque.
The factory computer-controlled exhaust valve is eliminated.
Features:
More Power: + 4 HP @ 6600 RPM, + 3 LB-FT @ 6600 RPM
Drone abatement technologies used to reduce cabin resonance
Enjoyably louder, sportier sound
Twin 70mm (2.75") laser engraved, polished or ceramic black 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)
1.3
Length
48
Material
304 Stainless Steel
Max HP Gain
4 @ 6600 RPM
Max Torque (lb-ft) Gain
3 @ 6600 RPM
Product Type
Axle-Back Exhaust
Sound Level
Moderate / Aggressive
System Type
Axle-back
Weight
51
Width
30
Part Number
D660-0046
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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