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.

• Twin 70mm (2.75") laser engraved, polished or ceramic black exhaust tips
• Uses the factory brackets and hangers for a factory-like fitment
• Drone abatement technologies used to reduce cabin resonance
• More Power: + 4 HP @ 6600 RPM, + 3 LB-FT @ 6600 RPM
• 100% 304 stainless steel construction
• Enjoyably louder, sportier sound

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