KB Hypereutectic Flat Top Piston Set - SB Ford 289-351W - Bore Size: 4.040", Stroke: 2.870", Rod Length: 5.090" Firebottle Safety Systems They feature a wear resistant

They feature a wear resistant tool steel axle and precision sorted needle bearings

5 amps of current (at 12 Volts) to operate

Stretchable Construction

Plates fit against outside edges of tires

KB Hypereutectic Flat Top Piston Set - SB Ford 289-351W - Bore Size: 4.040", Stroke: 2.870", Rod Length: 5.090" Firebottle Safety Systems They feature a wear resistantKeith Black pistons have several important advantages over conventional alloy pistons. High silicon content yields superior thermal and wear characteristics, greater strength, scuff and seizure protection, and resistance to cracking. High silicon content also keeps heat in the combustionchambers, eliminating heat transfer and improving combustion. Pistons are machined for 5 64" top, 5 64" second and 3 16" oil ring unless noted. Sold in sets of eight