Borg Warner GM 7.75" 9 Bolt Differential Girdle Cover and large HEIs or DuraSparks

and large HEIs or DuraSparks

Instead of spending the time and money refurbishing your existing heads

Step up to the high-rpm power of an open plenum with Speedmaster HiRise intake manifolds

And they also include a roller bearing at the end of the tailshaft which if lubricated by our reworked passages for the yoke and rear bearing assembly

Borg Warner GM 7.75" 9 Bolt Differential Girdle Cover and large HEIs or DuraSparksSpeedmaster 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.