There will be some additional weight savings by going with our 6-rib kit. However, our intentions for this kit was to make a more reliable kit compared to stock and then help people get one step closer to the supercharger kit. (Customers with the 6-rib will have a discount on the supercharger kit).
Here are the specs:
JHM 6-Rib Lightweight Pulley Weights versus OEM Pulley Weights:
- B6-B7 S4 OEM Crank Pulley: 7.0 lbs
- B6-B7 S4 OEM Delphi Alternator Pulley: 1.2 lbs
- B6-B7 S4 OEM Hitachi Alternator Pulley: 0.9 lbs
- Total weight, OEM Delphi Alternator Setup: 8.2 lbs
- Total weight, OEM Hitachi Alternator Setup: 7.9 lbs
- JHM B6-B7 S4 6-Rib, Lightweight Crank Pulley: 1.8 lbs
- JHM B6-B7 S4-RS4 6-Rib, Lightweight Alternator Pulley: 0.6 lbs
- Total weight, JHM 6-Rib, Lightweight Setup: 2.4 lbs
TOTAL WEIGHT SAVINGS:
- JHM 6-Rib, Lightweight versus Delphi Setup: 5.8 lbs or over a 70% weight reduction!!!
- JHM 6-Rib, Lightweight versus Hitachi: 5.5 lbs or over a 69% weight reduction!!!