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All Speedmaster 23deg
6" axle or GM 10-Bolt
Performance Cast Iron cylinder heads are designed to be a direct replacement for your worn or cracked heads
efficiency
Chevy SBC 383 ci 6.0" 4.030" 1.125" 0.927" Flat Top Forged Pistons All Speedmaster 23degSpeedmaster 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$ 180.00
US$ 145.00
