CP Piston BRS SBC 4.020 Bore 3.750 Stroke 5.700 Rod 1.425 Set Of 8 (MTO Non-Cancel)

This is a set of eight CP Pistons BRS pistons, specifically sized for a 4.020 inch bore with a 3.750 inch stroke and designed to work with a 5.700 inch connecting rod. These pistons are built for Small Block Chevy (SBC) engines and are made to order, meaning they are not cancelable once the order is placed. The 1.425 inch compression height is a key measurement that dictates how the piston sits in the cylinder relative to the deck surface, influencing your final compression ratio.

CP Pistons is known for making well-built internal engine components, and these forged pistons are no exception. Forging the aluminum gives it a stronger, more durable grain structure compared to cast pistons, making them a solid choice for high-performance applications where increased cylinder pressures and temperatures are expected. The BRS series often features specific skirt designs and ring land configurations aimed at improving performance and durability under demanding conditions. This set is specifically sized at 0.020 inches undersize for the bore, which is important if you are re-boring your block to a specific tolerance.

Because these pistons are made to order, it's crucial to ensure they are the correct specification for your engine build before purchasing. They are not CARB approved and cannot be shipped to California. If you're building a performance engine that requires robust internal components, these CP Pistons offer a strong foundation.