Load image into Gallery viewer, K1-6125-4120-400 - 4.210 Stroke-Pontiac Late  FXK1 Series -18cc Dish Top Pontiac Late-Forged-Piston-Set- 4.12 inch bore
Load image into Gallery viewer, K1-6125-4120-400 - 4.210 Stroke-Pontiac Late  FXK1 Series -18cc Dish Top Pontiac Late-Forged-Piston-Set- 4.12 inch bore
Load image into Gallery viewer, K1-6125-4120-400 - 4.210 Stroke-Pontiac Late  FXK1 Series -18cc Dish Top Pontiac Late-Forged-Piston-Set- 4.12 inch bore
Load image into Gallery viewer, K1-6125-4120-400 - 4.210 Stroke-Pontiac Late  FXK1 Series -18cc Dish Top Pontiac Late-Forged-Piston-Set- 4.12 inch bore

SKU: K1-6125-4120

K1-6125-4120-400 - 4.210 Stroke-Pontiac Late FXK1 Series -18cc Dish Top Pontiac Late-Forged-Piston-Set- 4.12 inch bore

Regular price $834.95
Sale price $834.95 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.

400 - 4.210 Stroke Pontiac Late FX Comp Height: 1.48 -18cc Dish Top PIN: .980 Ring Groove: 1/16-1/16-3/16" Stroke: 4.21 ROD: 6.625 Forged and Machined in Saint Charles Illinois USA! Boost and NOS Ready! (Moderate to High Levels) Includes matching DSS Racing Ductile Moly ring set. Comp Ratio: 62cc-11.37, 87cc-9.09, 124cc-7.10


Engine Brand: Pontiac

Engine Family: Pontiac Late

Engine Size: 400 - 4.210 Stroke

With/Without Rings: Includes Rings

Cylinder Bore Size: 4.120 in - 104.57 mm

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

Compression Height: 1.480

Pin Diameter: .980

Connecting Rod Length: 6.625 in

Crankshaft Stroke: 4.210 in

Piston Series: 1 - FX Series

Alloy: Forged 4032

Cylinder Head: Pontiac Late

TDC Assembly Height: 10.21

Piston Top Aprox. Comp. Ratio:

-18cc Dish Top Pontiac Late
ChamberComp Ratio
62cc11.37 to 1
87cc9.09 to 1
124cc7.1 to 1

Download Piston Instructions

Piston Specs

Engine Brand: Pontiac

Engine Family: Pontiac Late

Engine Size: 400 - 4.210 Stroke

With/Without Rings: Includes Rings

Cylinder Bore Size: 4.120 in - 104.57 mm

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

Compression Height: 1.480

Pin Diameter: .980

Connecting Rod Length: 6.625 in

Crankshaft Stroke: 4.210 in

Piston Series: 1 - FX Series

Alloy: Forged 4032

Cylinder Head: Pontiac Late

TDC Assembly Height: 10.21

Piston Top Aprox. Comp. Ratio:

-18cc Dish Top Pontiac Late
ChamberComp Ratio
62cc11.37 to 1
87cc9.09 to 1
124cc7.1 to 1

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature