March Performance 7671 Crank Pulley 5.5" 2-Groove V-Belt Underdrive

The March Performance 7671 is a precision-machined underdrive crank pulley designed to increase horsepower by reducing the speed of crank-driven engine accessories. This performance upgrade allows your engine to retain more power by decreasing the parasitic drag from accessories like the alternator, water pump, and power steering pump.

Key Specifications:

• Diameter: 5-1/2 inches
• 2-groove V-belt design
• CNC-machined from premium 6061-T6 billet aluminum
• Clear powdercoat finish for corrosion resistance and lasting appearance

Installation Requirements:

• Factory 3-bolt harmonic dampener required
• Dampener face to water pump flange face must measure 3-7/8 inches
• Passenger side lower radiator hose needed

Each March Performance pulley is manufactured to exacting tolerances to ensure proper belt alignment and reliable operation. The underdrive ratio reduces accessory speeds, freeing up power that would otherwise be consumed by auxiliary components, making this an ideal upgrade for performance applications.