Drive Kits and Components > Products STEF’S drive kit components are made out of the highest quality materials available today. All parts are engineered to fit with all component pieces. These “building block kits” are for the racer that needs to build his own specialized drive kit. All pulleys and spacers are black anodized for increased wear resistance. All STEF’S drive mandrels come with 1/8" key-way, dowel pins and woodruff key for correct balancer alignment. These mandrels can be cut to suit your particular application. Part No. Application 6533 Drive Mandrel-Hemi Blower Style 6 Bolt Even Space 6535 Drive Mandrel-SBC/90° V6-Long 6544 Drive Mandrel-BBC-Long 6545 Drive Mandrel-BBC-X-Long 6547 Drive Mandrel-302-351 Ford 3 or 4 Bolt-Long 6550 Drive Mandrel-429 Ford-4 Bolt-Long 6552 Hat Washer- Universal Bolt 6560 Pulley-"V" Belt 3" Diameter-1" I.D. 6561 Pulley-"Split-V" Belt 41/2" Diameter-1" I.D. 6565 Flange Washer-.150" Thick-1" I.D. 6569 Spacer-1/8" Wide-1" I.D. 6570 Spacer-1/4" Wide-1" I.D. 6571 Spacer-1/2" Wide-1" I.D. 6572 Spacer-3/4" Wide-1" I.D. 6575 Mounting Bracket Without Motor Plate-429-460 Ford 6577 SBC Steel Pump Relocation Bracket 6580 Water Pump Pulley Gilmer Style-28 tooth 6581 Water Pump Pulley Gilmer Style-30 tooth 6582 Water Pump Pulley Gilmer Style-32 tooth