gen 4 underdrive pulleys

ronandkate

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Has anyone heard of a set of gen 4 under drive pulleys? I was thinking about getting one of the sets of 4-5 pulleys that under drive most accessories.

Thoughts / comments
 
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They slow down the accessory drives and save some power. Also makes it easier on the pumps because they are not going so hard at higher RPM's.
 
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