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  3. ATK ENGINES SP61

ATK ENGINES SP61 Block Dished Pistons 408CI 23.5cc

fits model: Magnum. make: Chrysler.

23.5cc Atk Engines Sp61 Fits Chrysler 408ci Magnum Short Block -23.5cc Dished Pistons

( Brand: Atk Engines ), ( Manufacturer Part Number: SP61 ), ( Engine Size: 6.7 Cu. In. ), ( Type: Crate Engines ), ( California Prop 65 Warning: True )

Review ATK ENGINES Fits Chrysler 408ci Short Block Dished Pistons fits MAGNUM

Introducing the ATK ENGINE'S SP61 Chrysler 408ci Magnum Block with 23.5cc dished pistons, a high-performance solution for those seeking to build a powerful and reliable engine. This engine block is specifically designed for Chrysler applications, offering a large displacement of 408 cubic inches (6.6 liters) to deliver impressive torque and horsepower.

The SP61 Magnum Block boasts a number of advanced features to ensure superior strength and durability. It is constructed from premium cast iron material, providing the necessary rigidity to withstand the extreme forces generated during high-performance applications. The block is also equipped with a 4-bolt main bearing configuration to distribute the loads evenly and enhance engine stability.

One of the most notable features of this engine block is the inclusion of 23.5cc dished pistons. These pistons are designed to optimize combustion efficiency and power output through an increased displacement. The dished shape provides more contact area between the piston and the cylinder wall, resulting in improved ring sealing and reduced friction.

The SP61 Magnum Block also includes a number of other performance enhancements. Its cylinder bores are machined to a high degree of precision, ensuring optimal cylinder wall surface finish and improved ring sealing. The block also features a deep-skirt design, which helps to reduce vibrations and increase rigidity.

Additionally, the SP61 Magnum Block is compatible with a range of high-performance components, including forged crankshafts, high-performance connecting rods, and high-compression piston heads. This allows engine builders to further optimize the power output of their engine and achieve impressive results.

In summary, the ATK ENGINE'S SP61 Chrysler 408ci Magnum Block with 23.5cc dished pistons is an exceptional choice for those seeking to build a powerful and reliable high-performance engine for Chrysler applications. Its advanced design, superior strength, and compatibility with high-performance components make it a top choice for engine builders and enthusiasts alike.

The ATK ENGINE'S SP61 Chrysler 408ci Magnum block with dished pistons is a high-performance engine component designed for enthusiasts and racers. Here are some pros and cons to help you make an informed decision about purchasing this engine component:

Pros:

1. High-performance: This engine component is designed for high-performance applications. It has a large displacement of 408 cubic inches and dished pistons that provide better compression and power output.

2. Durability: The Magnum block is known for its strength and durability. It is designed to withstand the stresses of high-performance applications and can handle high horsepower and torque.

3. Customizability: This engine component is suitable for custom builds and can be used in various applications, such as hot rods, muscle cars, and race cars.

4. Improved Power: The dished pistons provide improved combustion efficiency, which results in increased power output and better engine performance.

Cons:

1. Cost: This engine component is not inexpensive. The cost of the SP61 Magnum block with dished pistons is significantly higher than that of a standard production engine block.

2. Complexity: Installing this engine component requires a high level of expertise and specialized tools. It is not a DIY project and should be left to professionals.

3. Fuel Consumption: The increased power output of this engine component comes at a cost of higher fuel consumption. This may not be suitable for those who prioritize fuel efficiency over performance.

4. Noise and Vibration: High-performance engines like this one can produce more noise and vibration than standard engines. This may not be desirable for those who prioritize a quiet and smooth driving experience.

Conclusion:

The ATK ENGINE'S SP61 Chrysler 408ci Magnum block with dished pistons is a high-performance engine component suitable for enthusiasts and racers who prioritize power and customizability over fuel efficiency and quiet operation. The durability and strength of the Magnum block make it an excellent choice for high-stress applications. However, the high cost, complexity of installation, and increased noise and vibration may not be suitable for all buyers.

Recommendation:

Before making a purchase, carefully consider your goals and priorities. If you are looking for a high-performance engine component for a custom build or racing application, then the SP61 Chrysler 408ci Magnum block with dished pistons is an excellent choice. However, if you prioritize fuel efficiency, quiet operation, or a lower cost, then this engine component may not be the best fit for you. It is always recommended to consult with a professional mechanic or engine builder before making a purchase to ensure that the engine component is suitable for your specific application.

Details:

Part # SP61 Condition New Brand ATK Engines Sold Each Details Engine Specifications: Block: OE Magnum 1993 -2001. Rings: . Bore/Stroke: 4.040 x 4.000. Rods: Scat 4340 forged I beam with ARP 8740 bolts.

Camshaft Bearings: Duran-Bond, installed and clocked to OEM position. Freeze Plugs: Brass, installed and sealed. Contact ATK for a recommendation if you re not certain about component to use.

Displacement: 408CI. Recommended Components: Balance: Internal balance. Oil Filter: Wiz or K and N per application. Flex plate/Flywheel: Internal balance.

Oil Galley Plugs: Installed and sealed. Crankshaft: Scat nodular iron internally balanced.

specifications grokengines:

  • for models: Magnum
  • for makes: Chrysler
  • brand: Atk Engines
  • mpn: Sp61
  • engine size: 6.7 Cu. In.
  • type: Crate Engines
  • california prop 65 warning: True

payments grokEngines:

  • wallet: Paypal
  • other
  • credit card: Mastercard

returns grokEngines:

  • policy: Returns Accepted
  • paid by: Buyer
  • time: 60 Days

offer grokEngines:

  • availability: In Stock
  • started: February 19, 2026
  • quantity: 2
  • options: Ship-to-home
  • sold: 0

seller grokEngines:

  • city: Lincoln, Nebraska
  • rating: 99.7%
  • # reviews: 350042

general grokEngines:

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

shipping grokEngines:

  • cost: $275.00
  • type: Fixed
  • class: Freight
  • service: Flat Rate Freight
for models: magnum, for makes: chrysler, engine size: 6.7 cu. in., type: crate engines, california prop 65 warning: true,
category: auto parts > car truck parts accessories > engines engine parts > engines, sku: 7434166678546983,

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