• LS 3" OD Billet Overdrive Alternator Pulley 6 Rib 10-10042-Motion Raceworks-Motion Raceworks
  • LS 3" OD Billet Overdrive Alternator Pulley 6 Rib 10-10042-Motion Raceworks-Motion Raceworks
  • LS 3" OD Billet Overdrive Alternator Pulley 6 Rib 10-10042-Motion Raceworks-Motion Raceworks
  • LS 3" OD Billet Overdrive Alternator Pulley 6 Rib 10-10042-Motion Raceworks-Motion Raceworks
  • LS 3" OD Billet Overdrive Alternator Pulley 6 Rib 10-10042-Motion Raceworks-Motion Raceworks
  • LS 3" OD Billet Overdrive Alternator Pulley 6 Rib 10-10042-Motion Raceworks-Motion Raceworks
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LS 3" OD Billet Overdrive Alternator Pulley 6 Rib 10-10042

Motion Raceworks

10-10042

 (64)

Motion Raceworks - 10-10042

$59.50

$69.99

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Racing Use Only, Not Legal for Road Use

Motion Raceworks LS 3" OD Overdrive Alternator Pulley

Factory alternators can be very dependable and easy to find, which is why most of the aftermarket industry builds front drive bracketry kits around these pieces. 

Designed to be used with LS style 6 rib LS Factory style alternators. Simply remove your factory alternator pulley with a puller and press on this alternator pulley.  

Note: This is compatible with LS1, LS2, LS3, LS6, LS7, LS9 alternators. Others may be compatible as well.

Machined from 6061 Aluminum

Made in the USA!

Shims included to adjust pulley for inconsistencies in casting, spacing of factory and aftermarket brackets.

Comes with: 
.019 Shim
.039 Shim

Please see the below chart for crank pulley size versus alternator pulley speed

Learn more about alternator pulley sizes and how they affect the performance and longevity of your alternator.