Engine Specifications

• Horsepower: 525 hp
• Torque: 550 lb/ft

Block Information:

• Seasoned OE 1991-1995 Gen V 4 bolt main 1pc seal (no mechanical fuel pump provision)
• Bore/Stroke: 4.310" x 4.000"
• Displacement: 454ci

Rotating Assembly:

• Crankshaft: OE reground
• Balance: External 
• Rods: OE power metal 6.135"
• Compression Ratio: 9.9:1
• Pistons: Hypereutectic
• Rings: Moly

Camshaft Specs:

• Camshaft: Hydraulic roller
• Cam Duration @ .050": Intake 225 / Exhaust 235
• Cam Lift: Intake .595" / Exhaust .601"
• Lobe Separation Angle: 112lsa
• Timing Chain: Double roller

Cylinder Head Information:

• Cylinder Heads: Edelbrock E-Street aluminum
• Combustion Chamber: 110cc
• Intake Runner: 290cc
• Valve Size: 2.19" Intake / 1.88" Exhaust
• Rocker Arms: Billet aluminum roller rockers 1.7 ratio

Oil Pan Information:

• Oil Pan: Rear sump 
• Oil Pump: Melling high volume

 Base Engines

• Short Block
• Camshaft
• Timing Set
• Cylinder Heads
• Valve Covers
• Timing Cover
• Oil Pan
• Oil Pump & Pickup Tube
• Flexplate

Mid Dress Engines

• Consists of Base Engine Build
• Intake Manifold
• Distributor
• Water Pump 
• Harmonic Balancer

Complete Engines

• Consists of Mid Dress Engine Build
• Fuel Pump
• Carburetor 
• Spark Plug Wires
• Spark Plugs

Unleash massive power and performance with the ATK HP 454 Big Block Chevy Crate Engine—the ultimate upgrade for muscle car enthusiasts and performance builders. With a robust 454 cubic inches, 525 horsepower, and 550 lb-ft of torque, this engine delivers exceptional performance, whether you're restoring a classic or building your dream car.

The 454 crate engine is designed to deliver impressive street and track performance, offering an unbeatable combination of raw power and reliability. Perfect for muscle cars, hot rods, or trucks, this engine features precision engineering and high-quality components to ensure durability and longevity. Whether you're replacing an aging motor or upgrading to something with more punch, the ATK HP 454 is ready to take your vehicle to the next level.

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The ATK 454 Big Block Chevy Crate Engine lineup is built for enthusiasts who want uncompromising big block power in a reliable, ready-to-install package. Featuring ATK HP 454 Big Block Chevy Crate Engines rated at 454ci, 525 horsepower, and 550 lb-ft of torque, this product group delivers serious street and strip performance without the time and uncertainty of a custom engine build. For muscle car owners, hot rodders, and truck builders, upgrading to a high-horsepower crate engine like the ATK 454 is one of the most impactful ways to transform overall vehicle performance.

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Performance Benefits & Key Features

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Typical features include a durable cast iron block, precision-balanced rotating assembly, performance camshaft profiles, and cylinder heads designed to optimize airflow and combustion efficiency. This combination enhances throttle response while maintaining drivability for street use. The substantial torque capacity also makes this engine well-suited for performance trucks and heavier classic platforms where low-end pulling power matters.

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Fitment, Compatibility & Applications

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