3-6020-4165D 425 Big Block Oldsmobile 3-FX Series -12cc Olds Flat Top Forged Piston Set. 4.165 bore
3-6020-4165D 425 Big Block Oldsmobile 3-FX Series -12cc Olds Flat Top Forged Piston Set. 4.165 bore
3-6020-4165D 425 Big Block Oldsmobile 3-FX Series -12cc Olds Flat Top Forged Piston Set. 4.165 bore
Load image into Gallery viewer, 3-6020-4165D 425 Big Block Oldsmobile 3-FX Series -12cc Olds Flat Top Forged Piston Set. 4.165 bore
Load image into Gallery viewer, 3-6020-4165D 425 Big Block Oldsmobile 3-FX Series -12cc Olds Flat Top Forged Piston Set. 4.165 bore
Load image into Gallery viewer, 3-6020-4165D 425 Big Block Oldsmobile 3-FX Series -12cc Olds Flat Top Forged Piston Set. 4.165 bore

SKU: 3-6020-4165D

3-6020-4165D 425 Big Block Oldsmobile 3-FX Series -12cc Olds Flat Top Forged Piston Set. 4.165 bore

$879.95
$879.95
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Ships in 1 - 8 days

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.

425 Big Block Oldsmobile 3-FX Series 2618 Alloy Comp Hgt: 1.625" -12cc Olds Flat Top Pin: .980 Ring Grooves: 1/16-1/16-3/16" Stroke: 3.975" Rod: 7.000" Forged and Machined in Saint Charles Illinois USA! Boost and NOS Ready! (Moderate to Extreme Levels) Aprox Comp Ratio: 72cc-10.54, 75cc-10.25, 77cc-10.06

Engine Brand: Oldsmobile

Engine Family: Big Block Oldsmobile

Engine Size: 425

With/Without Rings: Without Rings

Cylinder Bore Size: 4.165 in - 105.71 mm

Ring Width: 1/16-1/16-3/16"

Compression Height: 1.625"

Pin Diameter: .980

Connecting Rod Length: 7.000"

Crankshaft Stroke: 3.975"

Piston Series: 3-FX Series

Alloy: Forged 2618

Cylinder Head: Oldsmobile

TDC Assembly Height: 10.613

Piston Top Aprox. Comp. Ratio:

-12cc Olds Flat Top
ChamberComp. Ratio
72cc10.54 to 1
75cc10.25 to 1
77cc10.06 to 1

Download Piston Instructions

Piston Specs

Engine Brand: Oldsmobile

Engine Family: Big Block Oldsmobile

Engine Size: 425

With/Without Rings: Without Rings

Cylinder Bore Size: 4.165 in - 105.71 mm

Ring Width: 1/16-1/16-3/16"

Compression Height: 1.625"

Pin Diameter: .980

Connecting Rod Length: 7.000"

Crankshaft Stroke: 3.975"

Piston Series: 3-FX Series

Alloy: Forged 2618

Cylinder Head: Oldsmobile

TDC Assembly Height: 10.613

Piston Top Aprox. Comp. Ratio:

-12cc Olds Flat Top
ChamberComp. Ratio
72cc10.54 to 1
75cc10.25 to 1
77cc10.06 to 1

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature