Engine - Pulleys - Underdrive Pulley Kit

Contains steel crankshaft, water pump and alternator pulleys, plus bolts and installation instructions. Reduces accessory drive RPM by: (water pump – 14 percent) and (alternator –22 percent)…and significantly improves performance! Pulleys are manufactured on state-of-the-art CNC machines and have an awesome blue finish over zinc plating. Pulleys use production serpentine belt. WARNING: Engine cooling will be reduced.

Contains steel crankshaft, water pump and alternator pulleys, plus bolts and installation instructions. Reduces accessory drive RPM by: (water pump – 14 percent) and (alternator –22 percent)…and significantly improves performance! Pulleys are manufactured on state-of-the-art CNC machines and have an awesome blue finish over zinc plating. Pulleys use production serpentine belt. WARNING: Engine cooling will be reduced.

These V-belt horsepower pulleys increase horsepower by reducing accessory drive belt speed. Three-piece kit consists of crankshaft, water pump and alternator pulleys. Machined from cast aluminum.

These V-belt horsepower pulleys increase horsepower by reducing accessory drive belt speed. Three-piece kit consists of crankshaft, water pump and alternator pulleys. Machined from cast aluminum. Fits 1970-1978 Mustang with 289/302/351W/351C, 4-bolt crank pulley, Dual groove crank pulley, Single groove water pump pulley.

These V-belt horsepower pulleys increase horsepower by reducing accessory drive belt speed. Three-piece kit consists of crankshaft, water pump and alternator pulleys. Machined from cast aluminum.

Significant power increase, reduces power loss from accessories by reducing accessory pulley speed. 3-piece kit with hardware and instructions. 4.6L SOHC engines. Aids acceleration by reducing accessory speed compared to the crankshaft. WARNING: Engine cooling will be reduced.