K3-6020-4165D-425-Big Block Oldsmobile FXK3 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.165 inch bore
K3-6020-4165D-425-Big Block Oldsmobile FXK3 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.165 inch bore
K3-6020-4165D-425-Big Block Oldsmobile FXK3 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.165 inch bore
K3-6020-4165D-425-Big Block Oldsmobile FXK3 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.165 inch bore
Load image into Gallery viewer, K3-6020-4165D-425-Big Block Oldsmobile FXK3 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.165 inch bore
Load image into Gallery viewer, K3-6020-4165D-425-Big Block Oldsmobile FXK3 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.165 inch bore
Load image into Gallery viewer, K3-6020-4165D-425-Big Block Oldsmobile FXK3 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.165 inch bore
Load image into Gallery viewer, K3-6020-4165D-425-Big Block Oldsmobile FXK3 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.165 inch bore

SKU: K3-6020-4165D

K3-6020-4165D-425-Big Block Oldsmobile FXK3 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.165 inch bore

$1,054.95
$1,054.95
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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 Extreme Levels) Boost and NOS Ready! (Moderate to High Levels) Includes matching DSS Racing XP Severe Duty ring set. 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: Includes 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 in

Crankshaft Stroke: 3.975 in

Piston Series: 3 - FX Series

Alloy: Forged 2618

Cylinder Head: Oldsmobile

TDC Assembly Height: 10.6125

Piston Top Aprox. Comp. Ratio:

-12cc Flat Top Oldsmobile
ChamberComp Ratio
72cc10.54 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: Includes 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 in

Crankshaft Stroke: 3.975 in

Piston Series: 3 - FX Series

Alloy: Forged 2618

Cylinder Head: Oldsmobile

TDC Assembly Height: 10.6125

Piston Top Aprox. Comp. Ratio:

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

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature