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These Speedmaster rear main seal adapter kits are designed to install an early 2-piece style crankshaft into a late model
They provide higher power and torque transmission
We provide a threaded grease fitting on top and a drilled flex ball for better lubrication plus
8" and 9" rear ends
Chevy 400 427 Ford 351W Windsor 4.125" 1.015" Dished -16cc Forged Pistons These Speedmaster rear main sealSpeedmaster Forged pistons are made from 4032 aluminum alloy for quieter operation and reduced piston to wall clearance. Up to 20% lighter than traditional forged pistons that eliminate harmful stress concentrations for superior strength. Specifically designed for naturally aspirated or moderate nitrous applications.
US$ 50.00
US$ 50.00
US$ 513.00
US$ 779.50
