CP Piston Bullet Race Series Small Block Chevy 4.020 Bore 3.500 Stroke 6.000 Rod Set Of 8

If you're building a high-performance Small Block Chevy engine for racing or serious street use, a strong set of pistons is fundamental. This set from CP Pistons, part number BCR1320-020, is designed for a 4.020 inch bore with a 3.500 inch stroke and uses a 6.000 inch rod. These are forged pistons, which means they start as a solid block of aluminum that's heated and hammered into shape under immense pressure. This process aligns the grain structure of the metal, making them much stronger and more resistant to the extreme pressures and temperatures found in a performance engine compared to cast pistons.

The Bullet Race Series is built for durability under demanding conditions. CP Pistons uses advanced forging techniques and specific aluminum alloys to create pistons that can handle significant boost or high compression ratios without deforming or failing. This particular set is sized for a 4.020 inch bore, and it's important to ensure this matches your cylinder block's bore size. The 3.500 inch stroke and 6.000 inch rod length are key dimensions that determine your engine's displacement and rod-to-stroke ratio, so confirm these specifications align with your build plan. This set includes eight pistons, enough for a complete V8 engine.

When installing these pistons, it's crucial to follow the manufacturer's recommended clearances and lubrication procedures to ensure proper break-in and long-term reliability. Because these are performance racing pistons, they are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation guide for detailed specifications and best practices.