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350ci Stock-Type Pistons, .040" Overbore Piston Dia.: 4.040"
InfoVehicle Info Needed
SEALED POWERPART NUMBER: 844-L2256F40

350ci Stock-Type Pistons, .040" Overbore Piston Dia.: 4.040"

$63450
ShippingShips on 11/23/2026
Lowest PriceLowest Price Guarantee

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Small Block Chevy Stock-Type Pistons
    350ci Stock-Type Pistons, .040'' Overbore
  • Piston Dia.: 4.040''
  • Piston Top: Flat Top, 4-Valve Reliefs
  • Pressed Pin
  • Comp Ratio: 9.72:1 w/64cc Head, 8.62:1 w/76cc Head
  • Ring Grooves: 5/64'', 5/64'', 3/16''
  • Set of 8
    Speed-Pro developed Powerforged Pistons, and set the pace in powerforged technology. The high silicon VMS-75 alloy is found exclusively in pistons "powerforged" by Speed-Pro. Up to 3,000 tons of force forges aluminum slugs into the basic piston form, which creates a grain flow pattern in the structure providing excellent strength, ductility, and heat dissipation.

    Note: All compression ratios are approximate. They're figured with a gasket thickness representative of those commonly used.

Part TypePiston
Product LineSpeed-Pro Powerforged Small Block Chevy Pistons
BrandSEALED POWER
Package Height4.5
Package Width9.5
Package Length18.4
Weight14.45 PG
Part CategoryPerformance Parts
QuantitySet of 8
Part FitmentSemi Universal
Vendor Part NumberL2256F40
Package Qty1
Package TypeEA

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Some parts are not legal for use in California or other states with similar laws / regulations
p65 warning