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Ships within 48 hours · Estimated delivery Aug 5 - Aug 10
Speedmaster main caps are precision machined from superior-quality steel
providing competition engine builders with the most accurate valvetrain components available today
Don't trust any old brackets to hold your alternator
The automobile engine is a perfect balance of science and mechanical engineering
Ford SB 289 302 Windsor 5.4" 4.040" 1.090" 0.927" Flat Top Forged Pistons Speedmaster main caps are precisionSpeedmaster 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.
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