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Speedmaster 4340 Billet Steel crankshafts are manufactured from high quality true billet round bar stock
These aluminum push-in breathers from Speedmaster are just the thing to prevent oil splash while adding some style
Don't spend hours figuring out which pieces and parts you need to get what you want from your engine
horse power increase of 10-15
They are designed for stock or mildly modified engines for the value-conscious buyer
Borg Warner GM 7.75" 9 Bolt Differential Girdle Cover Speedmaster 4340 Billet Steel crankshaftsSpeedmaster 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.
