fits make: Chevy.

( Brand: Sportsman Racing Products ), ( Manufacturer Part Number: 139532 ), ( Part Type: Block Piston )
The 139532 Sportsman Racing 4.320 Big Block Chevy Piston is a high-performance component designed for serious racers and enthusiasts. This piston is crafted from top-quality forged 4340 chrome-moly steel, ensuring durability and reliability under the most demanding racing conditions.
The 4.320 bore size of this piston is ideal for big block Chevy engines, providing optimal power and torque. The piston top features a dish design with a 0.030-inch compression height, which allows for a generous combustion chamber size and efficient air-fuel mixture for improved engine performance.
The piston skirt is designed with a full-float, 2.150-inch width, which reduces friction and wear in the cylinder wall, extending the lifespan of the engine. The skirt also features a chamfered edge for easy installation and removal.
The wrist pin groove is cut with a 0.500-inch pin diameter and has a 1.000-inch pin to pin height, ensuring a secure and reliable connection between the piston and connecting rod. The piston ring grooves are machined to accept standard 1mm, 1.2mm, and 1.6mm piston rings, providing flexibility in ring choice for different applications.
The piston also features a molybdenum-coated skirt, which reduces friction and wear, and a high-tensile steel wrist pin, which provides strength and durability. The piston is also nitrided for added hardness and corrosion resistance.
In summary, the 139532 Sportsman Racing 4.320 Big Block Chevy Piston is a high-quality, high-performance component that offers durability, reliability, and improved engine performance for serious racers and enthusiasts. Its forged construction, full-float skirt, and molybdenum coating make it an excellent choice for big block Chevy engines, ensuring a long and successful racing career.
Pros of buying a 139532 Sportsman Racing 4.320 Big Block Chevy Piston:1. High-quality material: The piston is made of forged 4340 chromoly steel, which is known for its durability and strength, making it suitable for high-performance applications.
2. Large displacement: The 4.320-inch bore size allows the engine to produce more power and torque, providing better performance for racing applications.
3. Designed for Big Block Chevy engines: The piston is specifically designed for Big Block Chevy engines, ensuring a perfect fit and optimal performance.
4. High-compression ratio: The piston has a high-compression ratio, which allows the engine to produce more power by squeezing more air and fuel into the combustion chamber.
Cons of buying a 139532 Sportsman Racing 4.320 Big Block Chevy Piston:1. High cost: The piston is quite expensive, which may be a limitation for some buyers with a limited budget.
2. Requires specific engine set-up: The piston is designed for high-performance applications and may require specific engine set-up, such as high-flow cylinder heads and camshafts, to achieve optimal performance.
3. Limited availability: The piston may not be widely available, and it may take some time to source it from a reliable supplier.
Conclusion:The 139532 Sportsman Racing 4.320 Big Block Chevy Piston is a high-quality, high-performance piston that is well-suited for racing applications. Its high-quality material, large displacement, and high-compression ratio make it an excellent choice for those looking to improve their engine's performance. However, its high cost and specific engine set-up requirements may make it a less attractive option for some buyers. Ultimately, the decision to purchase this piston should be based on the buyer's specific needs and budget.
Recommendation:If you are looking for a high-performance piston for your Big Block Chevy engine, the 139532 Sportsman Racing 4.320 Big Block Chevy Piston is a solid choice. Its high-quality material, large displacement, and high-compression ratio make it an excellent option for racing applications. However, be prepared to invest a significant amount of money and time to source it and set up your engine for optimal performance. If the cost and time commitment are a concern, consider other options that may be more affordable and easier to source, such as standard pistons for Big Block Chevy engines.
Cc - big block Chevy set of 8 piston BBC high compression dome forged virgin islands.
In-stock items can ship from multiple locations.
Sportsman Racing Products in bore x 1 16 3 ring groove - plus 48.
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320 in bore big block Chevy piston 8 pc P/N - BBC high compression dome forged x 1 16 3 ring grooves plus 48.