CP Piston BRS Ford Big Block 521 Head: Kaase P51 Bore : 4.390 Set Of 8 (MTO Non-Cancel)

This is a set of CP Pistons BRS forged pistons specifically made for Ford Big Block 521 engines, designed to work with Kaase P51 cylinder heads. These pistons have a bore size of 4.390 inches and are 0.030 inches undersize, meaning they are intended for an engine block that has been bored out to this specific dimension. As a set of 8, they are ready to equip a V8 engine.

CP Pistons is known for building well-made performance engine components, and these BRS series pistons are no exception. They are constructed from strong forged aluminum, which offers a good balance of light weight and durability needed for high-performance applications. The BRS series is designed to handle the stresses of powerful engines, making them a solid choice for serious engine builds where reliability and performance are key. The 4.390-inch bore size is specific to certain Ford Big Block configurations, and the 0.030-inch undersize means they are intended for a block that has already been machined to this size, often done during an engine rebuild to ensure a perfect fit and optimal compression.

It's important to note that these pistons are made to order and are non-cancelable once the order is placed. Additionally, they are not CARB approved and cannot be shipped to California. If you are rebuilding a Ford Big Block 521 engine and need a set of high-performance forged pistons that are precisely sized for a machined block, these CP Pistons are a strong option.