BPS Underdrive Alternator Pulley (2011-2017 Mustang GT)


Shipping calculated at checkout

SKU: P014 Billet Pro Shop

Supreme Quality

Generous Return Policy

Spinning your alternator passed the factory limit often leads to failure. Extend your alternator’s life by reducing its maximum RPM while maintaining sufficient charge at idle. Our 15% underdrive alternator pulley will help keep the rpms within a more reasonable range when spinning past the factory limiter.  Our pulleys are CNC machined from billet 6061 aluminum and are hard black anodized for a durable finish.


*Includes  replacement nut

*Requires larger belt, part number: JK6847-B