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5" 10 Bolt axle
Speedmaster offers these HEI Upgrade kits for your stock distributor
The Speedmaster MidRise Air design features the identical plenum and runner design as the normal MidRise
It is designed to hold the amount of oil that is needed to lubricate the engine when it is running
They provide higher power and torque transmission
Ford SB / Mopar BB 0.507" OD 0.343" ID 2.087" Exhaust Valve Guide 5" 10 Bolt axleSpeedmaster valve guides are constructed from high quality bronze for durability and wear, and built to exacting tolerances, they replace your existing worn or damaged valve guides. These guides are offered in a variety of diameters to suit your application..
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