2-6020-4040D-425-Big Block Oldsmobile FX2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.04 inch bore
2-6020-4040D-425-Big Block Oldsmobile FX2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.04 inch bore
2-6020-4040D-425-Big Block Oldsmobile FX2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.04 inch bore
2-6020-4040D-425-Big Block Oldsmobile FX2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.04 inch bore
Load image into Gallery viewer, 2-6020-4040D-425-Big Block Oldsmobile FX2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.04 inch bore
Load image into Gallery viewer, 2-6020-4040D-425-Big Block Oldsmobile FX2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.04 inch bore
Load image into Gallery viewer, 2-6020-4040D-425-Big Block Oldsmobile FX2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.04 inch bore
Load image into Gallery viewer, 2-6020-4040D-425-Big Block Oldsmobile FX2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.04 inch bore

SKU: 2-6020-4040D

2-6020-4040D-425-Big Block Oldsmobile FX2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.04 inch bore

$699.95
$699.95
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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 FX Comp Height: 1.625 -12cc Flat Top PIN: .980 Ring Groove: 1/16-1/16-3/16" Stroke: 3.975 ROD: 7 Forged and Machined in Saint Charles Illinois USA! Boost and NOS Ready! (Moderate to High Levels) Comp Ratio: 72cc-10.05, 75cc-9.76, 77cc-9.58


Engine Brand: Oldsmobile

Engine Family: Big Block Oldsmobile

Engine Size: 425

With/Without Rings: Without Rings

Cylinder Bore Size: 4.040 in - 102.54 mm

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

Compression Height: 1.625

Pin Diameter: .980

Connecting Rod Length: 7.000 in

Crankshaft Stroke: 3.975 in

Piston Series: 2 - FX Series

Alloy: Forged 2618

Cylinder Head: Oldsmobile

TDC Assembly Height: 10.6125

Piston Top Aprox. Comp. Ratio:

-12cc Flat Top Oldsmobile
ChamberComp Ratio
72cc10.05 to 1
75cc9.76 to 1
77cc9.58 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: 4.040 in - 102.54 mm

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

Compression Height: 1.625

Pin Diameter: .980

Connecting Rod Length: 7.000 in

Crankshaft Stroke: 3.975 in

Piston Series: 2 - FX Series

Alloy: Forged 2618

Cylinder Head: Oldsmobile

TDC Assembly Height: 10.6125

Piston Top Aprox. Comp. Ratio:

-12cc Flat Top Oldsmobile
ChamberComp Ratio
72cc10.05 to 1
75cc9.76 to 1
77cc9.58 to 1

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature