Z20 Under drive pulley for A/C

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Price incl. VAT
Super lightweight crank pulleys 


With the standard crank pulley weighing in at a hefty 1.7Kg+, it was obvious it could go on a bit of a diet.
These crank pulleys only weigh 440 g,  a weight saving of almost 1.3Kg on the end of your crank!
The weight saving alone will give a more responsive feel to your engine, but it does not end there. As this pulley is smaller in size, it turns the alternator slightly slower, which causes the accessories to draw less energy from the engine, allowing you to get more onto the ground.
Another benefit of this size pulley, if you would like to remove air conditioning from your Z series engine. Utilising this pulley will allow you to direct route the belt straight to the alternator. Some minor modification to the top alternator bracket should be made to make fitting the belt easier.  By filing the top alternator bracket hole out to a slot this allows you to tension the belt in a more traditional manner.
Perfect for use with or without air conditioning this pulley is a great addition to any other engine modifications you currently run.
All pulleys kits come with the correct length belt for use either with or without aircon, some new high tensile fasteners will also be supplied in the kit.
We have used this pulley without issue for many years at the 450HP power area , we also have quite a few at around the 500HP area that have this pulley and have used it for years without issue - beyond this power we advise that a dapmer pulley is used again to snub some of the harmonics that are produced at big power. 



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