Chevy SBC 383 400 2Pc Rms 168 Tooth 11" External Balance Heavy Duty Flexplate a new lower housing casting

a new lower housing casting for enhanced fuel flow

valve stem seals

They are made of aluminum and feature a natural finish

a micro-switch for back-up lights and a neutral safety switch preventing accidental starts when in gear

reducing the load on all internal components

Chevy SBC 383 400 2Pc Rms 168 Tooth 11" External Balance Heavy Duty Flexplate a new lower housing castingSpeedmaster flexplates make excellent upgrades to your stock design. They feature extra thick steel that's double welded to the ring gear for added strength and anodized for corrosion resistance. Speedmaster flexplates will withstand the extreme power and rpm of today's engines.