Dinan's Free Flow axle-back exhaust for the E90 335i improves flow by reducing back pressure for a measured gain of 6 horsepower and 5 lb-ft at 6600 RPM. It is built from 100% 304 stainless steel and mounts to the factory hangers and brackets for a direct fit, resisting corrosion while shedding weight versus stock. Drone abatement tuning keeps the cabin civilized at cruise, while harder acceleration brings a louder, sportier tone. The system finishes with dual 3.5 inch laser engraved polished stainless tips.
Specifications
| Type | Free Flow axle-back exhaust |
| Material | 100% 304 stainless steel |
| Tips | Dual 3.5" laser engraved |
| Tip Finish | Polished stainless |
| Power Gain | +6 HP, +5 lb-ft @ 6600 RPM |
| Part Number | D660-0012 |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2007-2011 | BMW | 335i | Base |
| 2009-2011 | BMW | 335i xDrive | Base |
| 2007-2008 | BMW | 335xi | Base |
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