BPS Underdrive Alternator Pulley (2011-2026 Mustang GT)

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 18% 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.

70mm OD (measured at top of rib)

*Includes replacement nut

*Requires larger belt

BPS part number: P014