Wiseco BMW M50B25 2.5L 24V Turbo 84.50MM Bore +0.50 Oversized 8.8:1 CR Pistons

Wiseco is well-known for making strong internal engine components, and these Professional Series pistons are a prime example. If you're building a serious performance engine for your 1991-1995 BMW 525i, these pistons are designed to handle the demands of heavy to severe duty applications. They are specifically made for the M50B25 engine, with a bore size of 84.50mm and a compression ratio of 8.8:1, making them a solid choice for boosted or high-performance naturally aspirated builds.

These pistons are forged and machined in the USA from 2618 aluminum, which offers improved tensile strength for durability under stress. Wiseco has included several features to enhance performance and longevity, such as precision ring grooves, anti-detonation grooves, and additional ring seal features. The crown is fully machined, and they come with forced pin oiling to ensure proper lubrication. Plus, the ArmorGlide skirt coating helps reduce friction and resist seizure, leading to quieter operation and improved durability.

This set includes six pistons, the compression height is 38.20mm, and the pin diameter is 0.866 inches. Please note that these pistons are not CARB approved and cannot be shipped to California. They are designed for serious racers and builders looking to push their engine's limits.