1-2457-4185 420 Small Block Chevy 1-FX Series +4cc Dome Top Forged Piston Set. 4.185 bore
DISCONTINUED USE 1-2458-4185 420 Small Block Chevy 1-FX Series +4cc Dome Top Forged Piston Set. 4.185 bore
DISCONTINUED USE 1-2458-4185 420 Small Block Chevy 1-FX Series +4cc Dome Top Forged Piston Set. 4.185 bore
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SKU: 1-2457-4185

DISCONTINUED USE 1-2458-4185 420 Small Block Chevy 1-FX Series +4cc Dome Top Forged Piston Set. 4.185 bore

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420 Small Block Chevy 1-FX Series 4032 Alloy Comp Hgt: 1.362" +4cc Dome Top Pin: .927 Ring Grooves: 1.2/1.2/3MM Stroke: 3.875" Rod: 5.700" Boost and NOS Ready! (Moderate to High Levels) Aprox Comp Ratio: 58cc-14.85, 64cc-13.64, 70cc-12.63

Engine Brand: Chevy

Engine Family: Small Block Chevy

Engine Size: 420

With/Without Rings: Without Rings

Cylinder Bore Size: 4.185 in - 106.22 mm

Ring Width: 1.2/1.2/3MM

Compression Height: 1.362"

Pin Diameter: .927

Connecting Rod Length: 5.700"

Crankshaft Stroke: 3.875"

Piston Series: 1-FX Series

Alloy: Forged 4032

Cylinder Head: SBC 23 Degree

TDC Assembly Height: 9.000

Piston Top Aprox. Comp. Ratio:

+4cc Dome Top
ChamberComp. Ratio
58cc14.85 to 1
64cc13.64 to 1
70cc12.63 to 1

Download Piston Instructions

Piston Specs

Engine Brand: Chevy

Engine Family: Small Block Chevy

Engine Size: 420

With/Without Rings: Without Rings

Cylinder Bore Size: 4.185 in - 106.22 mm

Ring Width: 1.2/1.2/3MM

Compression Height: 1.362"

Pin Diameter: .927

Connecting Rod Length: 5.700"

Crankshaft Stroke: 3.875"

Piston Series: 1-FX Series

Alloy: Forged 4032

Cylinder Head: SBC 23 Degree

TDC Assembly Height: 9.000

Piston Top Aprox. Comp. Ratio:

+4cc Dome Top
ChamberComp. Ratio
58cc14.85 to 1
64cc13.64 to 1
70cc12.63 to 1

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature