Upgrade the sound and performance of your BMW M3 with the Dinan D660-0028 Free Flow Axle-Back Exhaust System. Designed specifically for the E90 sedan, this single-channel dual-exhaust system delivers a sportier exhaust note under wide-open throttle while remaining quiet and refined during light-throttle cruising. It reflects Dinan’s Performance Without Sacrifice philosophy by enhancing driving enjoyment without compromising the factory character of your BMW.
Constructed from durable 304 stainless steel, the Dinan D660-0028 uses a straight-through canister design and a Helmholtz chamber to help reduce unwanted exhaust drone. The system is engineered to use the factory brackets and hangers, providing a factory-like fitment and a straightforward installation. Quad 3-inch black ceramic-coated exhaust tips feature laser-engraved Dinan branding for a clean, performance-oriented appearance.
The Dinan Free Flow Axle-Back Exhaust is designed to provide measurable gains of up to 6 horsepower and 5 lb-ft of torque at 6,800 RPM, while weighing 10 pounds less than the stock BMW exhaust component. This combination of reduced weight, improved airflow, and enhanced sound makes it a practical upgrade for street-driven and performance-focused vehicles. The system fits 2008, 2009, 2010, and 2011 BMW M3 E90 sedans.
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