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Hypereutectic Pistons 351ci Cleveland +040
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SEALED POWERPART NUMBER: 844-H555CP40

Hypereutectic Pistons 351ci Cleveland +040

$56380
ShippingShips on 09/24/2026
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Small Block Ford
    Hypereutectic Pistons
  • Ford 351ci 5.8L Cleveland 1970-1974
  • 4.040" Bore (+.040")
  • Flat Top w/2 Valve Reliefs
  • Set of 8

    Technical Specs:
  • Material: Hypereutectic
  • Bore: 4.040' (102.616mm)
  • Piston Top: -2.0cc Flat Top w/2 Valve Reliefs
  • Compression Height: 1.645"
  • Rod Length: N/A
  • Stroke: 3.500"
  • Compression Ring Groove: 5/64"
  • Second Ring Groove: 5/64"
  • Oil Ring Groove Width: 3/16"
  • Full Length: N/A
  • Pin Size: 0.9122" O.D. (23.169mm)
  • Pin Type: Press-Fit
  • Skirt Type: DUROSHIELD Coated
  • Piston Skirt Clearance: 0.0010"
  • Notes: Stock Replacement; Must use 96 & higher octane premium fuel. Use Piston Ring p/n 844-E251X40 Standard Iron Set; p/n 844-E251K40 Premium Moly Set; p/n 844-E251KC40 Premium Chrome Set (Rings Not Included)

    Add Strength and Power to Your Pistons

    Sealed Power Hypereutectic Pistons are built to exacting tolerances and feature an aluminum casting with an anti-friction skirt coating that is highly resistant to scuffing and wear. The Duroshield skirt helps improve fuel economy, doesn't require any additional clearance, extends piston life, and increases horsepower with less friction. These durable pistons operate with tight bore clearances and work perfectly with normal-range ring end gaps, making them great for street, bracket racing, and oval track applications.

Part TypePiston
Product LineSealed Power Hypereutectic Pistons
BrandSEALED POWER
Package Height2.9
Package Width4.4
Package Length4.7
Weight1.67 PG
Part CategoryPerformance Parts
QuantitySet of 8
Vendor Part NumberH555CP40
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
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