KB Hypereutectic Flat Top Piston Set - SB Ford 289-351W - Bore Size: 4.040", Stroke: 2.870", Rod Length: 5.090" 4414MEDWH Manufactured with high temperature epoxy

Manufactured with high temperature epoxy which resists shock and vibration while increasing thermal conductivity

This is considered normal and is not a cosmetic defect

good idle quality

Carbon Fiber Look

Borgeson Steering U-Joint 1"-48 x 3/4" DD 14349

KB Hypereutectic Flat Top Piston Set - SB Ford 289-351W - Bore Size: 4.040", Stroke: 2.870", Rod Length: 5.090" 4414MEDWH Manufactured with high temperature epoxyKeith 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