Wiseco BMW 2.5L M50B25 85mm Bore 24V 8.8:1 Piston Set - 6 Cyl

Forged from high-strength 2618-T61 aluminum alloy, these Wiseco pistons are built to handle the demands of a performance BMW M50B25 engine. The 85mm bore size is a key specification for this set, designed to work with a 2.5L displacement and a 24-valve configuration. This specific piston set is engineered to achieve a compression ratio of 8.8:1, which is a notable change from stock and can be beneficial for forced induction applications or when using higher octane fuel.

Wiseco is well-known for its piston manufacturing expertise, and this set reflects that with features like a specific skirt profile designed to minimize friction and noise. The material choice, 2618-T61 aluminum, offers a good balance of strength and thermal expansion properties, crucial for maintaining proper clearances under varying engine temperatures. These pistons are intended for builders looking to either refresh a worn engine or build a more robust powerplant for performance driving.

When installing these pistons, it's important to follow the manufacturer's recommended clearances and ring gap settings, as these are critical for engine longevity and performance. This set is designed as a direct replacement for the pistons in your BMW M50B25 engine, assuming the cylinders are bored to 85mm. Please note that this part is not CARB approved and cannot be shipped to California.