Keith Black KB134.040 Flat Top 5.7 Rod Chevy 383 Hypereutectic Pistons

Keith Black Hypereutectic pistons are favored for their improved power and reduced scuffing. The unique design & manufacturing processes combine to produce a rigid piston, which will rock less in the bore improving ring seal. These T-5 heat treated pistons also offer reduced thermal expansion, which allows you to run tighter clearances and allows the piston rings to seal better and minimize blow-by. For S/B Chevy 383 c.i. (4.000" bore x 3.75" stroke). 390 Hypereutectic alloy. Fully machined crowns and valve reliefs. Drilled oil drain backs. Full floating wrist pins. Triple wound spiral locks. Reflective alloy allows 2% power increase. Quench dome technology minimizes deterioration. Zero deck quench designs. Lightweight wrist pins. Item DetailsC/R 58cc=11.9, 64cc=10.9, 76cc=9.6 Piston/Pin Weight: 650 g Rod Length: 5.7", Ring Style: A