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Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-KB172.030
Chevy 377ci Hypereutectic Pistons Flat Top
$46543
Ships on 09/08/2026
Lowest Price GuaranteeChevy 377ciFlat Top Pistons Use w/5.700'' Connecting Rods Use with Chevy 400ci Block and 350ci Crankshaft
- Chevy 377ci Hypereutectic Pistons
- Flat Top
- 4.155'' Bore (+.030'')
- Use w/5.700'' Connecting Rod & 3.480'' Crank Stroke
- Comp. Ratio: 11.5/58cc; 10.9/62cc; 10.7/64cc; 9.4/76cc
- 8/pkg
Technical Specs: - Alloy: Hypereutectic 390
- Bore: 4.155'
- Crankshaft Stroke: 3.480'
- Connecting Rod Length: 5.700'
- Deck Height: 9.025'
- Compression Height: 1.561'
- Pin Size: 0.9272'
- Pin Location: Centered
- Flat Top: -7cc 2 Symmetrical Valve Reliefs
- Intake Valve Relief: 0.280' Depth / 2.168' Diameter
- Exhaust Valve Relief: 0.280' Depth / 2.168' Diameter
- Top Landing Height: 0.275'
- Ring Grooves: 5/64' Top; 5/64' Middle; 3/16' Bottom
- Gram Weight: 580/145
- Compression Ratio: 11.5:1 w/58cc Heads; 10.9:1 w/62cc Heads; 10.7:1 w/64cc; 9.4:1 w/76cc Heads
- Use with 400ci block and 350ci crankshaft. This is a destroked 400ci chevy combination.
Part TypePiston
BrandUNITED ENGINE MACHINE
Package Height4.5
Package Width4.5
Package Length4.8
Weight1.8 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part NumberKB172.030
Package Qty1
Package TypeEA
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