CP Piston BRS SBC 4.145 Bore 4.00 Stroke 6.00 Set Of 8 (MTO Non-Cancel)

If you're building a high-performance Small Block Chevy engine, getting the right pistons is crucial for power and reliability. This set from CP Pistons is designed for serious builds, featuring a 4.145 inch bore and a 4.00 inch stroke, paired with a 6.00 inch rod length. These are forged pistons, meaning they start as a solid block of aluminum that's heated and hammered into shape, making them much stronger and more resistant to detonation than cast pistons. This strength is essential when you're pushing an engine hard, whether it's for racing, heavy towing, or just spirited driving.

CP Pistons is known for making well-built components for demanding applications. These pistons are made to order, which means they're built specifically for your order and aren't something we can cancel once placed. This ensures you get exactly what you need for your custom engine build. The 0.020 inch undersize specification is important to note; this means the pistons are machined to be 0.020 inches smaller than the nominal bore size, which is common when rebuilding an engine that has already been bored out or when aiming for a specific piston-to-wall clearance. Always confirm your block's bore size and consult with your engine builder to ensure this size is correct for your application.

Because these are made-to-order, please allow for production time. It's also important to know that these pistons are not CARB approved and cannot be shipped to California. If you're building a performance engine outside of California, this set offers a strong foundation for significant power gains and long-term durability.