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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27
to handle higher rpm
Standard valve sizes are 2
O-ring seal is included
They're machined from billet aluminum for lasting durability and good looks
power and economy
Ford SB 289 302 Windsor 5.4" 4.030" 1.090" 0.927" Flat Top Forged Pistons to handle higher rpmSpeedmaster 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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