Load image into Gallery viewer, 1-3971-4040  400M Small Block Ford 400M 1-FX Series -13cc Dish Top Boss/Canted  Forged Piston Set. 4.040 bore
Load image into Gallery viewer, 1-3971-4040  400M Small Block Ford 400M 1-FX Series -13cc Dish Top Boss/Canted  Forged Piston Set. 4.040 bore
Load image into Gallery viewer, 1-3971-4040  400M Small Block Ford 400M 1-FX Series -13cc Dish Top Boss/Canted  Forged Piston Set. 4.040 bore

SKU: 1-3971-4040

1-3971-4040 400M Small Block Ford 400M 1-FX Series -13cc Dish Top Boss/Canted Forged Piston Set. 4.040 bore

Regular price $719.95
Sale price $719.95 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.

400M Small Block Ford 400M 1-FX Series 4032 Alloy Comp Hgt: 1.710" -13cc Dish Top Boss/Canted Pin: .975 Ring Grooves: 1.2/1.2/3MM Stroke: 4.000" Rod: 6.580" Boost and NOS Ready! (Moderate to High Levels) Aprox Comp Ratio: 58cc-11.58, 61cc-11.19, 64cc-10.83

Engine Brand: Ford

Engine Family: Small Block Ford 400M

Engine Size: 400M

With/Without Rings: Without Rings

Cylinder Bore Size: 4.040 in - 102.54 mm

Ring Width: 1.2/1.2/3MM

Compression Height: 1.710"

Pin Diameter: .975

Connecting Rod Length: 6.580"

Crankshaft Stroke: 4.000"

Piston Series: 1-FX Series

Alloy: Forged 4032

Cylinder Head: 351 Cleveland \ Boss Open & Closed Chamber

TDC Assembly Height: 10.290

Piston Top Aprox. Comp. Ratio:

-13cc Dish Top Boss/Canted
ChamberComp. Ratio
58cc11.58 to 1
61cc11.19 to 1
64cc10.83 to 1

Download Piston Instructions

Piston Specs

Engine Brand: Ford

Engine Family: Small Block Ford 400M

Engine Size: 400M

With/Without Rings: Without Rings

Cylinder Bore Size: 4.040 in - 102.54 mm

Ring Width: 1.2/1.2/3MM

Compression Height: 1.710"

Pin Diameter: .975

Connecting Rod Length: 6.580"

Crankshaft Stroke: 4.000"

Piston Series: 1-FX Series

Alloy: Forged 4032

Cylinder Head: 351 Cleveland \ Boss Open & Closed Chamber

TDC Assembly Height: 10.290

Piston Top Aprox. Comp. Ratio:

-13cc Dish Top Boss/Canted
ChamberComp. Ratio
58cc11.58 to 1
61cc11.19 to 1
64cc10.83 to 1

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature