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Vehicle Info NeededUNITED ENGINE MACHINEPART NUMBER: 648-KB237.030
Chrysler 440ci Hypereutectic Pistons Flat Top
$50202
Ships on 09/08/2026
Lowest Price GuaranteeChrysler 440ciFlat Top Pistons
- Chrysler 440ci Hypereutectic Pistons
- Flat Top
- 4.350'' Bore (+.030'')
- Use w/6.768'' Connecting Rod & 3.750'' Crank Stroke
- Comp. Ratio: 11.5/72cc; 10.6/80cc; 10.2/85cc; 9.7/90cc
- 8/pkg
Notes: - Zero deck clearanceTechnical Specs:
- Alloy: Hypereutectic 390
- Bore: 4.350'
- Crankshaft Stroke: 3.750'
- Connecting Rod Length: 6.768'
- Deck Height: 10.725'
- Compression Height: 2.067'
- Pin Size: 1.094'
- Pin Location: Centered
- Flat Top: -5cc 2V Relief
- Intake Valve Relief: 0.264' Depth / 2.360' Diameter
- Exhaust Valve Relief: 0.264' Depth / 2.360' Diameter
- Top Landing Height: 0.275'
- Ring Grooves: 5/64' Top; 5/64' Middle; 3/16' Bottom
- Gram Weight: 770/190
- Compression Ratio: 11.5:1 w/72cc Heads; 10.6:1 w/80cc Heads; 10.2:1 w/85cc Heads; 9.7:1 w/90cc Heads
100% CNC Machined Pistons
New high silicon alloys and diamond tooling have give Keith Black designers the material and equipment for performance breakthroughs in engine design. KB piston are 100% CNC machined and T-6 heat treated from 16%-18% silcon Hypereutectic alloy. Features include drilled oil returns and pin oil supply, .072'' spiral wound retaining ring, 100% diamond turned, compensated high strength ring lands, high top ring location, 360° pressure pin oiling, diamond honed pin hole and lightweight rigid rib skirt design.
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Features:
- 390 Hypereutectic alloy with 16% Silicon
- 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
- Sold in Sets (except when noted as 1 piston per package)
Part TypePiston
Product LineUEM Pistons KB Signature Series Hypereutectic Chrysler Pistons
BrandUNITED ENGINE MACHINE
Package Height3.9
Package Width9.2
Package Length18.2
Weight18.49 PG
Part CategoryPerformance Parts
Piston Head Volume (Cc)5
Compression Distance2.067 in (52.502 mm)
Piston Ring Thickness (In.)5/64 x 5/64 x 3/16
Wrist Pin StylePress-fit or floating
QuantitySold as a set of 8
Piston MaterialHypereutectic aluminum
Pin Diameter1.094 in (27.8 mm)
Bore (Mm)110.49
Piston StyleFlat top, with two valve reliefs
Bore4.35 in (110.49 mm)
Vendor Part NumberKB237.030
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
