The Dinan Free Flow Axle-Back Exhaust is built from TIG-welded, 100% brushed T304 stainless steel with larger 76mm tubing versus the 70mm stock piping for freer flow, and twin 76mm computer-controlled valves that are about 30% less restrictive than the OE units, opening under load and quieting low-speed driving. It exits through quad 4.5in (114mm) double-walled, black ceramic-coated, laser-engraved tips that use an inverted clamp-neck design to hide the clamp and keep a clean, straight-cut face. Dinan rates gains of +8 HP and +6 lb-ft at 6600 RPM, and the system is about 5 lbs lighter than stock. Installation is bolt-on with the included mounting hardware.
Specifications
| Type | Free Flow axle-back exhaust (dual-valve) |
| Material | T304 stainless steel, TIG welded, brushed |
| Tips | Quad 4.5in (114mm) double-walled, laser-engraved, inverted clamp-neck |
| Finish | Black ceramic-coated tips |
| Valves | Twin 76mm computer-controlled (30% less restrictive than OE) |
| Piping Diameter | 76mm (vs 70mm stock) |
| Power Gain | +8 HP & +6 lb-ft @ 6600 RPM |
| Part Number | D660-0086-BLK |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2024 | BMW | X3 | M |
| 2020-2022 | BMW | X3 | M Competition |
| 2020-2025 | BMW | X4 | M |
| 2020-2022 | BMW | X4 | M Competition |
Recently viewed
You may also like
