Dinan's lightweight billet aluminum crankshaft pulley underdrives each of the accessories by 13 percent, reducing parasitic drag on the engine for a 6 HP @ 8000 RPM and 4 lb-ft torque @ 8000 RPM gain on a stock vehicle. The Dinan underdrive pulley retains the factory harmonic crankshaft damper, eliminating vibration that might otherwise damage the crankshaft.
13 Percent Underdrive - Billet Aluminum - E60/E63/E64
- Lightweight billet aluminum crankshaft pulley, black anodized and engraved.
- All accessories are underdriven by 13% to decrease drag on the engine.
- Includes mounting hardware and shorter belts.
| Air Freight Prohibited: false |
| Not Carb Approved: false |
| Carb Acknowledgement Required: false |
| Ltl Freight Required: false |
| Prop 65: Y |
| Part Type: automotive |
| Epa: N/A |
| Regular Stock: false |
| Units Per Sku: 1 |
Vehicle Fitment
| Years |
Make |
Model |
Trim |
| 2006–2010 |
BMW |
M5 |
|
| 2006–2010 |
BMW |
M6 |
|