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UNITED ENGINE MACHINEPART NUMBER: 648-KB251.040-1
Chrysler 450ci Hypereutectic Piston Step Dome Top .260"
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This product is no longer available. Please call customer service for assistance at 1-800-345-4545.
Chrysler 450ciStep Dome Top Pistons Use with Chrysler 400ci Block
- Chrysler 450ci Hypereutectic Piston
- Step Dome Top .260''
- 4.382'' Bore (+.040'')
- Use w/6.358'' Connecting Rod & 3.750'' Crank Stroke
- Comp. Ratio: 12.9/72cc; 11.8/80cc; 11.2/85cc; 10.7/90cc
- 1/pkg
Notes: - Made from Chrysler 400ci block
- Use only stock length (6.358') connecting rods
- Suggest checking quench dome with clay for clearance
- Closed chamber heads require the quench dome to be machined down
- Compression ratio will change with quench dome machiningTechnical Specs:
- Alloy: Hypereutectic 390
- Bore: 4.382'
- Crankshaft Stroke: 3.750'
- Connecting Rod Length: 6.358'
- Deck Height: 9.980'
- Compression Height: 1.722'
- Pin Size: 1.094'
- Pin Location: Centered
- Step Dome Top: .260' 4.4cc 2V Relief
- Intake Valve Relief: 0.264' Depth / 2.360' Diameter
- Exhaust Valve Relief: 0.264' Depth / 2.360' Diameter
- Top Landing Height: 0.221'
- Ring Grooves: 5/64' Top; 5/64' Middle; 3/16' Bottom
- Gram Weight: 705/190
- Compression Ratio: 12.9:1 w/72cc Heads; 11.8:1 w/80cc Heads; 11.2:1 w/85cc Heads; 10.7:1 w/90cc Heads
Part TypePiston
BrandUNITED ENGINE MACHINE
Package Height4.0
Package Width4.0
Package Length4.0
Weight2.09 PG
Part CategoryPerformance Parts
Vendor Part NumberSKB251.040
Package Qty1
Package TypeEA
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