Wiseco BMW 2.5 24V M50B25 -13.5cc Dome 8.8:1 CR 84.5mm Bore 75mm Stroke Piston Shelf Stock Kit

This is a Wiseco forged piston shelf stock kit for BMW 2.5L 24-valve M50B25 engines. These pistons are designed to replace your stock pistons, featuring a -13.5cc dome volume that results in a compression ratio of 8.8:1 when used with the stock 75mm stroke crankshaft and an 84.5mm bore. Wiseco is well-known for its high-performance forged pistons, which are built to handle increased cylinder pressures and temperatures often found in modified or performance-oriented engines.

Forged pistons like these offer a significant advantage over cast pistons. They are made from a solid block of aluminum that is heated and then pressed into shape under extreme pressure. This process creates a much stronger and more durable piston with a finer grain structure, making them more resistant to detonation and mechanical stress. The 84.5mm bore size is specific to this kit, ensuring a precise fit for your engine build. The 8.8:1 compression ratio is a popular choice for naturally aspirated builds aiming for improved torque and throttle response, or for forced induction setups where lower compression is needed to safely run higher boost levels.

This kit includes the necessary pistons for a complete engine build. It's important to note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures, especially when dealing with critical engine components like pistons.