KRC's Professional Series pulley kits are the perfect start to your front engine system. These kits come with a 4.0" aluminum water pump pulley, with a 6-groove main drive and a 3-groove accessory drive, an aluminum crankshaft pulley, R-LOK crank adapter, belt and the appropriate hardware. With a 1/2" larger diameter pulley, these kits provide more belt surface than our Standard Series pulleys, helping to prevent belt slippage at higher RPM's. Professional Series kits will also clear cartridge style water pumps. Available in 15%, 30% and 1-to-1 water pump reductions. Chevrolet Block Mounted pulley kits are designed to work with a KRC block mounted steering pump bracket and a 4.2" serpentine power steering pump. Additional accessories and/or different power steering pump pulley size may require a different belt length.
 

These Kits Include
15% Kit	30% Kit	1-to-1 Kit
KRC 38025400	KRC 38025400	KRC 38025400
KRC 38235000	KRC 38230000	KRC 38240000
KRC 38140000	KRC 38140000	KRC 38140000
KRC 38400900	KRC 38400900	KRC 38400900
GDY 4060330	GDY 4060325	GDY 4060335