1. Car & Truck Engines Used/New Products
  2. sku: 5787183417683631
  3. ATK ENGINES HP451P

ATK ENGINES HP451P Base Engine Seal 653517517860 525HP 1PC.

fits make: Chevy.

Hp451p Atk Engines Fits Chevy 454 Base Engine 525hp 1pc. Seal

( Brand: Atk Engines ), ( Manufacturer Part Number: HP451P ), ( Engine Size: 454 Cu. In. ), ( Type: Crate Engines ), ( Universal Fitment: Yes ), ( California Prop 65 Warning: True ), ( UPC: 653517517860 )

Review ATK ENGINES Fits Chevy Base Engine 525hp 1pc. Seal fits 454

The ATK Engines HP451P Chevy 454 Base Engine is a high-performance powerplant designed for those seeking an increase in horsepower and torque for their classic Chevrolet vehicles. This engine is a 454 cubic inch (7.5 liters) V8 unit, delivering an impressive 525 horsepower and substantial torque output.

The HP451P engine is a complete long-block assembly, meaning it includes all major components, such as the cylinder block, crankshaft, pistons, connecting rods, cylinder heads, and camshaft. It is a carbureted engine, suitable for traditional applications where electronic fuel injection systems may not be an option.

Each component of this engine is meticulously crafted to provide superior power and reliability. The cylinder block is made from high-strength iron for enhanced durability and improved thermal performance. The crankshaft is forged from premium steel, ensuring maximum strength and stiffness. The pistons are engineered with a high-strength alloy to handle the increased power output, while the connecting rods provide the necessary strength to transfer the force from the pistons to the crankshaft.

The HP451P engine features new, high-performance cylinder heads. These heads include large intake and exhaust valves, and improved combustion chamber designs to optimize airflow and fuel mixture for improved power output. The engine also includes a high-performance camshaft, designed to provide increased valve lift and duration for enhanced power and torque.

The HP451P engine comes with a single-plane intake manifold, which ensures excellent airflow and throttle response. The engine is also equipped with a high-performance oiling system, ensuring proper lubrication for all moving parts under high power loads.

Overall, the ATK Engines HP451P Chevy 454 Base Engine is an excellent choice for those seeking a high-performance powerplant for their classic Chevrolet vehicle. With its impressive horsepower output, superior component quality, and meticulous engineering, this engine is sure to provide reliable power and performance for years to come.

Buying an ATK Engines HP451P Chevy 454 base engine with a power output of 525 horsepower and a single seal comes with several pros and cons that you may want to consider before making a purchase.

Pros:

1. Power: This engine offers a significant power boost compared to the standard Chevy 454 base engine. An additional 101 horsepower can provide better performance and acceleration.

2. Upgradeability: Installing this high-performance engine in your vehicle can be a great upgrade for those seeking more power and better driving experience.

3. Customization: With the HP451P engine, you can customize your vehicle's power output to your preference.

4. Quality: ATK Engines are known for their high-quality components and strict manufacturing processes, ensuring durability and reliability.

Cons:

1. Cost: The HP451P engine is a high-performance engine, and as such, it typically comes with a higher price tag compared to the standard base engine.

2. Complexity: Installing a high-performance engine like the HP451P can be a complex process, requiring specialized tools and knowledge. It may be necessary to hire a professional for the installation.

3. Fuel Efficiency: Increased power often comes at the cost of reduced fuel efficiency. This engine may consume more fuel than the standard base engine.

4. Maintenance: A high-performance engine like the HP451P may require more frequent maintenance to keep it running at optimal performance.

Ending Conclusion:

The ATK Engines HP451P Chevy 454 base engine is a powerful upgrade for those seeking more performance and customization options for their vehicle. However, it comes with a higher cost, increased complexity, and potential fuel efficiency and maintenance concerns. Ultimately, the decision to purchase this engine depends on your priorities, budget, and the specific needs of your vehicle.

Recommendation:

If you are looking for a powerful upgrade for your Chevy 454 engine and have the budget and resources for the installation, the ATK Engines HP451P may be a suitable option for you. However, if you are concerned about the cost, complexity, or potential fuel efficiency and maintenance issues, it may be worth considering other upgrade options or waiting until you have the necessary resources to make the transition to a high-performance engine.

Details:

Roller, Cam Specs: 225/235 50 .595in/.601ex 112LSA, Timing Chain: Double roller, Cylinder Heads: Outbreak aluminum E-street 110cc/290cc 2.19/1.88, Rocker Arms: Billet 1.7 ratio, Oil Pan: Champ 7qt Street/Strip pan with vintage tray, Pump: Mewling high volume. Oil Galley Plugs: Installed And Sealed. Recommended Components: Balance: Power Bond external balance 8 #PB1451-N, Flex plate/Flywheel: Pioneer #FRA-321 168 tooth, Intake Manifold: Outbreak performer RPM dual plane #7161, Distributor: HEI Iron gear, Water Pump: OE long pump, Carburetor: Quick Fuel 780 cfm vacuum secondary's with electric choke #HR-780, No mechanical fuel pump provision, must run an Spark Plugs: Auto lite #3923, Plug Wires: 8mm.

Part # HP451P Condition New Brand ATK Engines Sold Each Details Info Engine Specifications: HP: 525, TQ: 550, Block: OE block 1991 1995 Gen V 4 bolt main 1pc seal NO MECHANICAL FUEL PUMP PROVISION, Bore/Stroke: up to 4.310 x 4.0 Displacement: 454, Crankshaft: Reground external balance, Rods: powder metal 6.135, Pistons: Forged 9.9:1 compression, Rings: Molly, Camshaft: HUD. Freeze Plugs: Brass Installed And Sealed. Camshaft Bearings: Installed And Clocked to OEM Position. Pistons: .

Engine Info: Oil: Conventional / Non Synthetic 10W30 with Comp Cam zinc additive #159 for first 3000 miles, Oil Filter: Wiz or K N per application, Timing: 34-36 Degrees, Spark Plug Gap: .035, Firing Order: 18436572, Octane: 91, Stall Converter: 2200-25 Exhaust: 1 5/8 Headers. Piston Rings: Molly Rings.

specifications grokengines:

  • for makes: Chevy
  • brand: Atk Engines
  • mpn: Hp451p
  • engine size: 454 Cu. In.
  • type: Crate Engines
  • universal fitment: Yes
  • california prop 65 warning: True
  • upc: 653517517860

shipping grokEngines:

  • type: Fixed
  • cost: $275.00
  • class: Freight
  • service: Flat Rate Freight

seller grokEngines:

  • city: Lincoln, Nebraska
  • # reviews: 326242
  • rating: 99.2%

payments grokEngines:

  • credit card: Visa
  • wallet: Paypal
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general grokEngines:

  • condition: New
  • Car Truck Parts Accessories > Engines Engine Parts > Engines

offer grokEngines:

  • availability: In Stock
  • started: August 29, 2025
  • options: Ship-to-home
  • sold: 0
  • quantity: 2

returns grokEngines:

  • policy: Returns Accepted
  • paid by: Buyer
  • time: 60 Days
for makes: chevy, engine size: 454 cu. in., type: crate engines, universal fitment: yes, california prop 65 warning: true,
category: auto parts > car truck parts accessories > engines engine parts > engines, sku: 5787183417683631,

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