Machined from Billet Aluminum, this Gilmer Alternator Drive Kit is a must for street/strip engines that have a problem with belt slippage at high RPM. The kit comes complete with a crank pulley, water pump pulley, alternator pulley, and a 1-1/2'' wide belt.Note: Will not work with Power Steering or A/C. Designed to work with factory OE style alternator brackets.