![Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Satin] Speedmaster harmonic balancers are crafted](https://cdn.shopify.com/s/files/1/0762/0316/3867/files/1-147-076.jpg?v=1785328173)
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Speedmaster harmonic balancers are crafted from high-quality steel and feature a tuned elastomer for optimal engine performance
The steel gaskets help even out the flow between the head and header flange to minimize warping
The Speedmaster valve locks will fit any Speedmaster 10 degree retainer and are recommended for all race applications due to their superior strength
Up to 20% lighter than traditional forged pistons that eliminate harmful stress concentrations for superior strength
The plates provide up to -3
Oldsmobile 400 425 455 MID-AIR™ MidRise Aluminum Intake Manifold [Satin] Speedmaster harmonic balancers are crafted
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