Ford SB 289 302 Windsor 5.4" 4.030" 1.090" 0.927" Flat Top Forged Pistons They're made from quality steel

They're made from quality steel

but both factors can be equally important in a race car

Their performance

They're machined from billet aluminum for lasting durability and good looks

O-ring seal is included

Ford SB 289 302 Windsor 5.4" 4.030" 1.090" 0.927" Flat Top Forged Pistons They're made from quality steelSpeedmaster 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.