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ATK Marine DM03 Chevy 350 Rebuilt LB - Reverse Rotation features specialized reverse-rotation technology combined with rugged cast iron components to deliver reliable aquatic power for twin-engine setups.

• Engine Output: Reverse Rotation 350 CI.
• Total Displacement: 5.7L / 350 CI.
• Head Material: Durable Cast Iron Heads.
• Structural Block: Cast Iron Block foundation.
• Primary Design: Hydraulic Flat Tappet valvetrain.

One Year Limited Warranty Included.

ATK Marine DM07 Chevy 305 5.0L Rebuilt Long Block Engine provides a precision-engineered 5.0L foundation featuring rugged cast iron heads for boaters seeking reliable Small Block Chevy marine power.

• Stroker Displacement: 5.0L / 305 CI.
• Cylinder Material: Cast Iron Head Material.
• Main Foundation: Cast Iron Engine Block.
• Camshaft Style: Hydraulic Flat Tappet design.
• Seal Configuration: Two-Piece Rear Main Seal.

Official Performance Engine Warranty Included.

ATK Marine DM29 Chevy 4.3L V6 Rebuilt Long Block Engine delivers track-validated 4.3L V6 performance featuring rugged cast iron heads and a seasoned block for reliable marine-grade power.

• Total Displacement: 4.3L / 262 CI volume.
• Head Construction: Rugged Cast Iron material.
• Block Composition: Cast Iron Engine Block.
• Balance Style: Internal and External Balance.
• Valvetrain Style: Hydraulic roller OE cam.

ATK Performance Limited Warranty Included.

ATK Marine DM32 Chevy 454 7.4L Rebuilt Long Block Engine features elite Big Block technology combined with rugged cast iron heads to provide reliable track-proven power for boating performance.

• Stroker Volume: 7.4L / 454 CI.
• Head Material: Durable Cast Iron Heads.
• Structural Foundation: Cast Iron Block material.
• Camshaft Style: Hydraulic Flat Tappet design.
• Seal Configuration: Two-Piece Rear Main Seal.

One Year Limited Warranty Included.

ATK Marine DMA1-GTP Ford 351W High Performance Rebuilt LB delivers a precision-engineered 5.8L foundation featuring high-flow cast iron heads and a reinforced block for reliable offshore marine operation.

• Displacement Data: 5.8L / 351 CI.
• Cylinder Heads: Cast Iron material choice.
• Main Block: Cast Iron Block foundation.
• Balance Style: External Engine Balance specs.
• Valvetrain Type: Hydraulic Flat Tappet cam.

Official ATK High-Performance Warranty Included.

ATK Marine DMB3 Chevy 305 5.0L Rebuilt Long Block Engine provides track-validated 5.0L marine power featuring rugged cast iron heads and a reinforced block for reliable watercraft operation.

• Power Volume: 5.0L / 305 CI displacement.
• Head Construction: Rugged Cast Iron material.
• Main Block: Cast Iron Engine Block.
• Balance Style: Internal and External Balance.
• Valvetrain Type: Hydraulic flat tappet cam.

ATK Performance Limited Warranty Included.

ATK Marine Engine DMH4 Crate Engines unleash 260 hp to maximize high-rpm thermal efficiency during demanding vessel operations, strictly engineered for inboard or sterndrive marine propulsion setups.

• Cylinder incorporates premium 8 cylinder V8 layouts
• Horsepower delivers reliable 260 hp output rating
• Engine Capacity covers 5.7L displacement architecture
• Fuel Type utilizes standard marine fuel delivery
• Assembly features bare rebuilt long block components

ATK Marine DMK2 Chevy 454 7.4L Rebuilt Long Block Engine delivers precision-engineered Big Block power featuring rugged cast iron heads and a balanced assembly for reliable offshore boating performance.

• Displacement Data: 7.4L / 454 CI.
• Cylinder Heads: Cast Iron material choice.
• Main Block: Cast Iron Block foundation.
• Balance Setup: External Engine Balance specs.
• Primary Components: Hydraulic roller OE cam.

Official ATK High-Performance Warranty Included.

ATK Marine DMW4 Chevy 4.3L V6 Roller Rebuilt Long Block delivers a precision-engineered 4.3L foundation featuring rugged cast iron heads for boaters seeking reliable Chevy marine power.

• Stroker Displacement: 4.3L / 262 CI.
• Cylinder Material: Cast Iron Head Material.
• Main Foundation: Cast Iron Engine Block.
• Camshaft Style: Hydraulic roller OE cam.
• Seal Configuration: One-Piece Rear Main Seal.

Official Performance Engine Warranty Included.

ATK Marine DMX1 Chevy 4.3L V6 Roller Rebuilt Long Block offers professional marine-grade V6 performance featuring rugged cast iron heads and a seasoned block for high-torque watercraft applications.

• Horsepower Rating: 262 CI Marine grade.
• Actual Displacement: 4.3L / 262 CI.
• Head Type: Cast Iron Cylinder Heads.
• Block Material: Cast Iron Construction block.
• Internal Valvetrain: Hydraulic roller OE cam.

Standard Factory Engine Warranty Included.