Borg Warner GM 7.75" 9 Bolt Differential Girdle Cover These Speedmaster supercharger manifolds are

These Speedmaster supercharger manifolds are aluminum constructed and suitable for competition or street use

With their compression-style design

We made our own upgraded versions

Speedmaster gilmer drive-style crankshaft pulley spacers are specifically designed to help achieve proper belt alignment

These Speedmaster engine lift plates will allow you to lift your engine up by its intake manifold for easier maneuvering

Borg Warner GM 7.75" 9 Bolt Differential Girdle Cover These Speedmaster supercharger manifolds areSpeedmaster aluminum differential covers. Made from cast aluminum with thick gasket rails to resist oil leaks, and feature cast in ribs for added strength and heat dissipation. The cover includes mounting bolts for a complete installation.