Holden Commodore VS VT VX VY 3.8L V6 ECOTEC BILLET 20% Underdrive Pulley KIT – Alternator, Power Steering & Water Pump Pulleys

Our ECOTEC Underdrive alternator, water pump & power steering pump pulleys are larger than the factory pulleys. Engine accessories like the alternator, water pump, and power steering will always take horsepower from your engine. By replacing the Holden factory sized pulleys with larger light-weight pulleys, these accessories are slowed & take less power, making more horsepower available to the rear wheels. They also prevent the power steering pump, water pump, and alternator from overheating under high-RPM applications. All pulleys are quick and easily to install. Simply remove the factory pulley and install our billet pulley. Optional Finish: Anodized Black or Raw/Silver Material: Billet 6061 Aluminium Kit Includes: 1 x Billet Underdrive (20% larger than factory) Alternator Pulley 1 x Billet Underdrive (20% larger than factory) Power Steering Pump Pulley 1 x Billet Underdrive (20% larger than factory) Water Pump Pulley Important Note About Fan Belts When upgrading to our Underdrive pulleys, you’ll need to purchase a larger fan belt. Suitable replacement fan belts can be sourced from outlets like Repco or Autobarn. There are two different belt lengths on ECOTEC Commodore models. EARLY MODELS with AC: If you have a factory 6PK2720 size belt, you will require a 6PK2810 size belt to run our three pulleys. LATE MODELS with AC: If you have a factory 6PK2820 size belt, you will require a 6PK2910 size belt to run our three pulleys. For other models (e.g. Non-AC), you will need to measure your required belt length.