K3-6635-4185-390-AMC V8 FXK3 Series -25cc Dish Top AMC-Forged-Piston-Set- 4.185 inch bore
K3-6635-4185-390-AMC V8 FXK3 Series -25cc Dish Top AMC-Forged-Piston-Set- 4.185 inch bore
K3-6635-4185-390-AMC V8 FXK3 Series -25cc Dish Top AMC-Forged-Piston-Set- 4.185 inch bore
K3-6635-4185-390-AMC V8 FXK3 Series -25cc Dish Top AMC-Forged-Piston-Set- 4.185 inch bore
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Load image into Gallery viewer, K3-6635-4185-390-AMC V8 FXK3 Series -25cc Dish Top AMC-Forged-Piston-Set- 4.185 inch bore
Load image into Gallery viewer, K3-6635-4185-390-AMC V8 FXK3 Series -25cc Dish Top AMC-Forged-Piston-Set- 4.185 inch bore
Load image into Gallery viewer, K3-6635-4185-390-AMC V8 FXK3 Series -25cc Dish Top AMC-Forged-Piston-Set- 4.185 inch bore

SKU: K3-6635-4185

K3-6635-4185-390-AMC V8 FXK3 Series -25cc Dish Top AMC-Forged-Piston-Set- 4.185 inch bore

$1,054.95
$1,054.95
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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.

390 AMC V8 FX Comp Height: 1.59 -25cc Dish Top PIN: 1.000 Ring Groove: 1/16-1/16-3/16" Stroke: 3.574 ROD: 5.858 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: 50cc-10.58, 54cc-10.15, 58cc-9.75


Engine Brand: AMC

Engine Family: AMC V8

Engine Size: 390

With/Without Rings: Includes Rings

Cylinder Bore Size: 4.185 in - 106.22 mm

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

Compression Height: 1.590

Pin Diameter: 1.000

Connecting Rod Length: 5.858 in

Crankshaft Stroke: 3.574 in

Piston Series: 3 - FX Series

Alloy: Forged 2618

Cylinder Head: AMC

TDC Assembly Height: 9.235

Piston Top Aprox. Comp. Ratio:

-25cc Dish Top AMC
ChamberComp Ratio
50cc10.58 to 1
54cc10.15 to 1
58cc9.75 to 1

Download Piston Instructions

Piston Specs

Engine Brand: AMC

Engine Family: AMC V8

Engine Size: 390

With/Without Rings: Includes Rings

Cylinder Bore Size: 4.185 in - 106.22 mm

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

Compression Height: 1.590

Pin Diameter: 1.000

Connecting Rod Length: 5.858 in

Crankshaft Stroke: 3.574 in

Piston Series: 3 - FX Series

Alloy: Forged 2618

Cylinder Head: AMC

TDC Assembly Height: 9.235

Piston Top Aprox. Comp. Ratio:

-25cc Dish Top AMC
ChamberComp Ratio
50cc10.58 to 1
54cc10.15 to 1
58cc9.75 to 1

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature