Load image into Gallery viewer, 3-3425-4030-Boss 302-Small Block Ford 289 - 302 FX3 Series +7.5cc  Dome Top 351 Cleveland \ Boss Open & Closed Chamber-Forged-Piston-Set- 4.03 inch bore
Load image into Gallery viewer, 3-3425-4030-Boss 302-Small Block Ford 289 - 302 FX3 Series +7.5cc  Dome Top 351 Cleveland \ Boss Open & Closed Chamber-Forged-Piston-Set- 4.03 inch bore
Load image into Gallery viewer, 3-3425-4030-Boss 302-Small Block Ford 289 - 302 FX3 Series +7.5cc  Dome Top 351 Cleveland \ Boss Open & Closed Chamber-Forged-Piston-Set- 4.03 inch bore
Load image into Gallery viewer, 3-3425-4030-Boss 302-Small Block Ford 289 - 302 FX3 Series +7.5cc  Dome Top 351 Cleveland \ Boss Open & Closed Chamber-Forged-Piston-Set- 4.03 inch bore

SKU: 3-3425-4030

3-3425-4030-Boss 302-Small Block Ford 289 - 302 FX3 Series +7.5cc Dome Top 351 Cleveland \ Boss Open & Closed Chamber-Forged-Piston-Set- 4.03 inch bore

Regular price $939.95
Sale price $939.95 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.

Boss 302 Small Block Ford 289 - 302 FX Comp Height: 1.3 +7.5cc Dome Top PIN: .927 Ring Groove: 1.2/1.2/3MM Stroke: 3 ROD: 5.4 Forged and Machined in Saint Charles Illinois USA! Boost and NOS Ready! (Moderate to Extreme Levels) Comp Ratio: 58cc-11.65, 64cc-10.66, 70cc-9.85


Engine Brand: Ford

Engine Family: Small Block Ford 289 - 302

Engine Size: Boss 302

With/Without Rings: Without Rings

Cylinder Bore Size: 4.030 in - 102.28 mm

Ring Width: 1.2/1.2/3MM

Compression Height: 1.300

Pin Diameter: .927

Connecting Rod Length: 5.400 in

Crankshaft Stroke: 3.000 in

Piston Series: 3 - FX Series

Alloy: Forged 2619

Cylinder Head: 351 Cleveland \ Boss Open & Closed Chamber

TDC Assembly Height: 8.200000000000001

Piston Top Aprox. Comp. Ratio:

+7.5cc Dome Top 351 Cleveland \ Boss Open & Closed Chamber
ChamberComp Ratio
58cc11.65 to 1
64cc10.66 to 1
70cc9.85 to 1

Download Piston Instructions

Piston Specs

Engine Brand: Ford

Engine Family: Small Block Ford 289 - 302

Engine Size: Boss 302

With/Without Rings: Without Rings

Cylinder Bore Size: 4.030 in - 102.28 mm

Ring Width: 1.2/1.2/3MM

Compression Height: 1.300

Pin Diameter: .927

Connecting Rod Length: 5.400 in

Crankshaft Stroke: 3.000 in

Piston Series: 3 - FX Series

Alloy: Forged 2619

Cylinder Head: 351 Cleveland \ Boss Open & Closed Chamber

TDC Assembly Height: 8.200000000000001

Piston Top Aprox. Comp. Ratio:

+7.5cc Dome Top 351 Cleveland \ Boss Open & Closed Chamber
ChamberComp Ratio
58cc11.65 to 1
64cc10.66 to 1
70cc9.85 to 1

Download Piston Instructions

Engine Power TV

The DSS FX, X-Groove Feature