Load image into Gallery viewer, K3-6140-4125-400 - 4.375 Stroke-Pontiac Late  FXK3 Series -7cc Flat Top  Pontiac Late-Forged-Piston-Set- 4.125 inch bore
Load image into Gallery viewer, K3-6140-4125-400 - 4.375 Stroke-Pontiac Late  FXK3 Series -7cc Flat Top  Pontiac Late-Forged-Piston-Set- 4.125 inch bore
Load image into Gallery viewer, K3-6140-4125-400 - 4.375 Stroke-Pontiac Late  FXK3 Series -7cc Flat Top  Pontiac Late-Forged-Piston-Set- 4.125 inch bore
Load image into Gallery viewer, K3-6140-4125-400 - 4.375 Stroke-Pontiac Late  FXK3 Series -7cc Flat Top  Pontiac Late-Forged-Piston-Set- 4.125 inch bore

SKU: K3-6140-4125

K3-6140-4125-400 - 4.375 Stroke-Pontiac Late FXK3 Series -7cc Flat Top Pontiac Late-Forged-Piston-Set- 4.125 inch bore

Regular price $1,054.95
Sale price $1,054.95 Regular price
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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.

400 - 4.375 Stroke Pontiac Late FX Comp Height: 1.222 -7cc Flat Top PIN: .990 Ring Groove: 1/16-1/16-3/16" Stroke: 4.375 ROD: 6.8 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: 62cc-13.33, 87cc-10.33, 124cc-7.86


Engine Brand: Pontiac

Engine Family: Pontiac Late

Engine Size: 400 - 4.375 Stroke

With/Without Rings: Includes Rings

Cylinder Bore Size: 4.125 in - 104.69 mm

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

Compression Height: 1.222

Pin Diameter: .990

Connecting Rod Length: 6.800 in

Crankshaft Stroke: 4.375 in

Piston Series: 3 - FX Series

Alloy: Forged 2618

Cylinder Head: Pontiac Late

TDC Assembly Height: 10.2095

Piston Top Aprox. Comp. Ratio:

-7cc Flat Top Pontiac Late
ChamberComp Ratio
62cc13.33 to 1
87cc10.33 to 1
124cc7.86 to 1

Download Piston Instructions

Piston Specs

Engine Brand: Pontiac

Engine Family: Pontiac Late

Engine Size: 400 - 4.375 Stroke

With/Without Rings: Includes Rings

Cylinder Bore Size: 4.125 in - 104.69 mm

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

Compression Height: 1.222

Pin Diameter: .990

Connecting Rod Length: 6.800 in

Crankshaft Stroke: 4.375 in

Piston Series: 3 - FX Series

Alloy: Forged 2618

Cylinder Head: Pontiac Late

TDC Assembly Height: 10.2095

Piston Top Aprox. Comp. Ratio:

-7cc Flat Top Pontiac Late
ChamberComp Ratio
62cc13.33 to 1
87cc10.33 to 1
124cc7.86 to 1

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature