KB Chevy 377/400 Hypereutectic Pistons, Flat Top, 5.7/5.565 Rod
377 Chevy Small Block V8, 400 Chevy Small Block V8, Hypereutectic Aluminum Piston Material
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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 Chevy 377 c.i. (4.125" bore x 3.48" stroke x 5.7" rod) and Chevy 400 c.i. (4.125" bore x 3.75" stroke x 5.565").
- 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
Ring Style Chart (GIF)
474-172 Instructions (PDF)
Item Details(377) C/R 58cc=11.5, 64cc=10.7, 76cc=9.4
(400) C/R 58cc=12.3, 64cc=11.4, 76cc=10.1
Piston/Pin Weight: 580 g
Rod Length: 5.7(377), 5.565(400)
Ring Style: A
- Comp Height 5.565" Rod - 1.561
- Comp Height 5.7" Rod - 1.433
- Comp Height 6.0" Rod - 1.13
- Pin Diameter - 0.9272
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