The pulley comes specifically maintaining the stock diameter so as to not under drive and cause electrical woes for the owner, as well as maintaining the stock drive belt surface to make for a quick and easy install by even the most novice of owners. Pulley weight is 1.2lbs.
The COBB Tuning Lightweight Main Pulley is CAD designed and CNC machines from Billet 6061-T6 and anodized to withstanding the toughest of under engine conditions. Replacing the factory main pulley, the lightweight unit improves acceleration by reducing the rotational mass of the stock unit by as much as 4lbs.
- Works with every Subaru EJ-Series engine.
- Billet 6061-T6 Construction
- Anodized in Black
- Stock Diameter
- Reduce Rotational Mass by 4 lbs Over Stock
- Pulley Weight = 1.2 lbs
- For high horsepower builds above 400 AWHP we recommend using a Fluidampr pulley due to sensitivity in crankshaft vibration.