Load image into Gallery viewer, 1-2455-4125  420 Small Block Chevy 1-FX Series -21cc Dish Top  Forged Piston Set. 4.125 bore
Load image into Gallery viewer, 1-2455-4125  420 Small Block Chevy 1-FX Series -21cc Dish Top  Forged Piston Set. 4.125 bore
Load image into Gallery viewer, 1-2455-4125  420 Small Block Chevy 1-FX Series -21cc Dish Top  Forged Piston Set. 4.125 bore

SKU: 1-2455-4125

1-2455-4125 420 Small Block Chevy 1-FX Series -21cc Dish Top Forged Piston Set. 4.125 bore

Regular price $669.95
Sale price $669.95 Regular price
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Ships in 1 - 8 days

Made in the USA

Made in the USA

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This is a pre order item. We will ship it when it comes in stock.

420 Small Block Chevy 1-FX Series 4032 Alloy Comp Hgt: 1.362" -21cc Dish 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-10.66, 64cc-10.05, 70cc-9.50

Engine Brand: Chevy

Engine Family: Small Block Chevy

Engine Size: 420

With/Without Rings: Without Rings

Cylinder Bore Size: 4.125 in - 104.7 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:

-21cc Dish Top
ChamberComp. Ratio
58cc10.66 to 1
64cc10.05 to 1
70cc9.50 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: 4.125 in - 104.7 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:

-21cc Dish Top
ChamberComp. Ratio
58cc10.66 to 1
64cc10.05 to 1
70cc9.50 to 1

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature