Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Satin] The Speedmaster valve locks will

The Speedmaster valve locks will fit any Speedmaster 10 degree retainer and are recommended for all race applications due to their superior strength

Speedmaster harmonic balancers are crafted from high-quality steel and feature a tuned elastomer for optimal engine performance

Designed specifically not to crack at high operating pressure like cast pistons

From valve covers and carburettor base gaskets to full engine gasket sets

Up to 20% lighter than traditional forged pistons that eliminate harmful stress concentrations for superior strength

Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Satin] The Speedmaster valve locks will