60mm Wide Gilmer Drive Adapter Pulley - Mopar Chrysler SB 318 340 360 BB 383 440 Speedmaster aluminum crankshaft pulleys are

Speedmaster aluminum crankshaft pulleys are manufactured from 356 aluminum that is heat-treated to T-6 specs

Made from 4340 round bar to exact tolerances

They feature extra-thick steel that's double-welded to the ring gear for added strength

Suits: 1-149-004 and 1-149-005 Manifolds

Note: The 52000/52001 manifold is a stock replacement/street legal part for 302

60mm Wide Gilmer Drive Adapter Pulley - Mopar Chrysler SB 318 340 360 BB 383 440 Speedmaster aluminum crankshaft pulleys areSpeedmaster gilmer drive style crankshaft pulley spacers are specifically designed to help achieve proper belt alignment. They're machined from billet aluminum for lasting durability and good looks.