K1-3870-4040 Boss 302 Small Block Ford 289 - 302 K1-FX Series -3cc Flat Top Boss/Canted Forged Piston Set. 4.040 bore
K1-3870-4040 Boss 302 Small Block Ford 289 - 302 K1-FX Series -3cc Flat Top Boss/Canted Forged Piston Set. 4.040 bore
K1-3870-4040 Boss 302 Small Block Ford 289 - 302 K1-FX Series -3cc Flat Top Boss/Canted Forged Piston Set. 4.040 bore
Load image into Gallery viewer, K1-3870-4040 Boss 302 Small Block Ford 289 - 302 K1-FX Series -3cc Flat Top Boss/Canted Forged Piston Set. 4.040 bore
Load image into Gallery viewer, K1-3870-4040 Boss 302 Small Block Ford 289 - 302 K1-FX Series -3cc Flat Top Boss/Canted Forged Piston Set. 4.040 bore
Load image into Gallery viewer, K1-3870-4040 Boss 302 Small Block Ford 289 - 302 K1-FX Series -3cc Flat Top Boss/Canted Forged Piston Set. 4.040 bore

SKU: K1-3870-4040

K1-3870-4040 Boss 302 Small Block Ford 289 - 302 K1-FX Series -3cc Flat Top Boss/Canted Forged Piston Set. 4.040 bore

$904.95
$904.95
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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.

Boss 302 Small Block Ford 289 - 302 K1-FX 4032 Alloy With Rings Comp Hgt: 1.535" -3cc Flat Top Boss/Canted Pin: .912 Ring Grooves: 1.2/1.2/3MM Stroke: 3.000" Rod: 5.155" Boost and NOS Ready! (Moderate to High Levels) Aprox Comp Ratio: 58cc-10.09, 61cc-9.71, 64cc-9.37

Engine Brand: Ford

Engine Family: Small Block Ford 289 - 302

Engine Size: Boss 302

With/Without Rings: Includes Rings

Cylinder Bore Size: 4.040 in - 102.54 mm

Ring Width: 1.2/1.2/3MM

Compression Height: 1.535"

Pin Diameter: .912

Connecting Rod Length: 5.155"

Crankshaft Stroke: 3.000"

Piston Series: 1-FX Series

Alloy: Forged 4032

Cylinder Head: 351 Cleveland \ Boss Open & Closed Chamber

TDC Assembly Height: 8.190

Piston Top Aprox. Comp. Ratio:

-3cc Flat Top Boss/Canted
ChamberComp. Ratio
58cc10.09 to 1
61cc9.71 to 1
64cc9.37 to 1

Download Piston Instructions

Piston Specs

Engine Brand: Ford

Engine Family: Small Block Ford 289 - 302

Engine Size: Boss 302

With/Without Rings: Includes Rings

Cylinder Bore Size: 4.040 in - 102.54 mm

Ring Width: 1.2/1.2/3MM

Compression Height: 1.535"

Pin Diameter: .912

Connecting Rod Length: 5.155"

Crankshaft Stroke: 3.000"

Piston Series: 1-FX Series

Alloy: Forged 4032

Cylinder Head: 351 Cleveland \ Boss Open & Closed Chamber

TDC Assembly Height: 8.190

Piston Top Aprox. Comp. Ratio:

-3cc Flat Top Boss/Canted
ChamberComp. Ratio
58cc10.09 to 1
61cc9.71 to 1
64cc9.37 to 1

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature