We normally see charging issues on most LS engines revving past 6500 RPM, especially builds with multiple pumps, controllers, & other amp drawing components. In order to prevent the alternator from overspinning, we have come up with an overdrive solution.
Constructed from 6061 billet aluminum, this 3.1" overdrive alternator pulley is made to replace the GM steel pulley. With a 3.1” OD, and a 6-groove serpentine design with raised belt retainers to prevent belt walk, it is the perfect solution to those wanting to keep an OE alternator. Compatible with all 1998-2002 F-Body, 2004-2006 GTO, and 1999-2013 GM trucks, including small case and large case alternators.
For OE 99-06 TRUCK accessories use belt k060942.