6PSI - 20PSI BOOST PULLEY UPGRADE KIT TO SUIT HOLDEN L67 SUPERCHARGED V6

INCLUDES FREE LOAN OF THE PULLEY REMOVAL/INSTALLATION TOOL

($160 bond required which is fully refundable when the tool is returned in satisfactory condition)

Our Mace L67 supercharger boost upgrade kit comprises of a special modular hub, pulley size of your choice from 3.8" (6PSI) to 2.42" (20PSI) and a free loan of our factory pulley removal/installation tool (additional $160 refundable bond required).

Our boost upgrade kits are a cost effective way to bump up the performance of your factory supercharged V6 Commodore by increasing boost pressure.

Unlike some other supercharger pulley kits on the market, our pulleys are made from aircraft grade aluminium, which have been hard anodized so they won’t break or wear out.

Vehicle Fitment Guide

The best part about this performance upgrade is that at the very most it takes about an hour to do! There is no need for removing superchargers, replacing gaskets, and spending unnecessary time and money to achieve our results. In addition, once our special hub is in place, changing of pulleys literally becomes a 10 minute job such that you can now easily swap from a 10 PSI pulley to a smaller or larger one of your choice (tune and different belt length may be required depending on size).

As shown in the below dyno graph, we had the 10 PSI boost upgrade kit fitted to one of our customers' VT L67 Commodore which already had a full exhaust and cold air intake and it made an outstanding 146.8 KW at the rear wheels. An increase of 15kw from stock with no tune in sight! Just goes to show how much Holden really watered down the performance of these engines.

Greater power gains can be achieved if further mods are undertaken such as an intercooler, larger cam, etc.

Caution: We do not recommend fitting a pulley smaller than 3.4" (10PSI) on a stock supercharged V6. Excessive boost pressure may induce knock and potential engine damage. A physically smaller pulley can only be used when the motor is intercooled, cammed and dyno tuned or has a combination of all 3.98 Octane fuel must be used when installing an aftermarket supercharger pulley.

Please contact us if you have any questions or concerns regarding this warning.

Note: 3.5" (9 PSI) to 3.3" (11 PSI) Boost pulley upgrade kit with belt can be purchased though another listing.