The Dinan Valved Axle-Back Exhaust is fabricated from 100% T304 stainless steel with TIG-welded piping and no restrictive hydroformed sections, and it retains full factory valve control for on-demand sound. Larger-diameter piping increases exhaust flow while drone-abatement tuning keeps cabin resonance in check. The system finishes in dual 4-inch (102mm) straight-cut, double-walled polished tips with a laser-engraved Dinan logo, and delivers up to +4 HP and +3 ft-lb of torque.
| Type | Valved Axle-Back Exhaust |
| Material | 100% T304 Stainless Steel |
| Finish | Brushed pipes, polished tips |
| Size | Dual 4 in (102mm) straight-cut, double-walled tips |
| Quantity | 1 (complete system) |
| Part Number | D660-0091 |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2019-2024 | BMW | 330i | Base |
| 2019-2024 | BMW | 330i xDrive | Base |
| 2021-2024 | BMW | 430i | Base |
| 2021-2024 | BMW | 430i xDrive | Base |
