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Vehicle Info NeededMANLEYPART NUMBER: 660-590830-8
4 Barrel Class Pistons SB-Chevy
$77806
Ships on 11/09/2026
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Flat Top Pistons1/16'', 1/16'', 3/16'' Ring Grooves 6.000'' Rod Length with 3.750'' Stroke 6.125'' Rod Length with 3.480-3.500'' Stroke
- 4 Barrel Class Pistons
- SB-Chevy
- Flat Top -4.0cc
- 4.030'' Bore (+.030'')
- 6.000'' Rod Length w/3.750'' Stroke
- 6.125'' Rod Length w/3.480-3.500'' Stroke
- 1.125'' Comp. Height
- 1/16'', 1/16'', 3/16'' Ring Grooves
- 8/pkg.
Technical Specs: - Compression Height: 1.125'
- Piston & Pin Weight: 494 grams
- Flat Top: -4.0cc valve reliefs
- Pin Size: 0.927' dia, 2.300' long, .130' wall
- Round Wire Locks: .061'
- Ring Grooves: 1/16' Top; 1/16' Middle; 3/16' Bottom
- Piston Clearance: .005' measured 1.100' from bottom of the oil ring
- Valve Notches: .300' Intake, .190' Exhaust
Platinum Series Pistons
Professional engine builders and elite tuners around the world are running Manley pistons for some very good reasons. Manley uses domestic 2618 high strength alloy forgings and unique (to Manley) fixturing allowing skirt turning / ring groove machining be performed in one single operation to ensure the ultimate ring groove to skirt squareness for better ring seal. Cam and barrel (skirt) profiles that make power but are friendly on the cylinder walls. Manley is well known for their high quality valvetrain components, but insiders also trust and use Manleys top quality pistons and connecting rods.
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Features:
- Designed for 4 Barrel Class Racing
- Based on Standard 4.000'' bore block
- 23° Head Applications
- Lightweight Design
- Slightly thicker deck (.185'') for higher horsepower applications
- 2618 High Strength Alloy
- 1/16'', 1/16'', 3/16'' Ring Grooves or Gas Ported .043'', .043'', 3mm Ring Grooves
- Perfect Ring Groove to Skirt Squareness
- Round Wire Locks Included
- Pressure Balance Groove
- Full Banded Skirt design for Increased Skirt Stability
- .927'' Dia. x 2.300'' Long x .130'' Wall Premium Chrome Moly Wrist Pin
Piston Common Specs: - Flat Top Compression Ratio: 10.4:1 w/ 64cc Combustion Chamber & 3.48'' Stroke
- Dome Volume: -4.0cc (Flat Top)
- Crown Thickness: .185''
- Ring Thickness: Top Ring - 1/16'' or .043'' Gas Ported (.155'' down); Second Ring - 1/16'' or .043''; Oil Ring - 3/16'' or 3mm
- Valve Notches: .300'' Intake, .190'' Exhaust
- Maximum Fly Cut: .360'' Intake, .260'' Exhaust
- Maximum Valve Sizes: 2.125'' Intake; 1.650'' Exhaust
- Valve Angle: 22°
- Pin Included: Premium Chrome Moly .927'' dia, 2.300'' long, .130'' wall
- Round Wire Locks: .061'' wide
- Recommended Piston Clearance: .005'' measured 1.100'' from bottom of the oil ring
Technical Note: Compression ratios are calculated at .005'' deck clearance, a 4.060'' head gasket I.D. with a .040'' compressed thickness.
Part TypePiston
Product LineManley Small Block Chevy ''4 Barrel Class'' Flat Top Pistons
BrandMANLEY
Package Height7.75
Package Width9.0
Package Length9.0
Weight10.0 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part Number590830-8
Package Qty1
Package TypeEA
Some parts are not legal for use in California or other states with similar laws / regulations
