Wiseco BMW M50B25 2.5L 24V Turbo 85.00MM Bore +1.00 Oversized 8.8:1 CR Pistons

If you're rebuilding the engine in your 1991-1995 BMW 525i for serious performance, especially with a turbo setup, these Wiseco forged pistons are a solid choice. These are designed for the M50B25 engine and are oversized by 1.00mm, bringing the bore to 85.00mm. They're built to handle the demands of heavy to severe duty racing applications, giving you the confidence to push your engine further.

Wiseco makes these pistons in the USA from 2618 aluminum, which is known for its improved tensile strength, making them well-built for high-stress environments. You'll find precision ring grooves, anti-detonation features, and additional sealing improvements to help keep everything running smoothly and efficiently under pressure. The crown is fully machined, and they feature forced pin oiling for better lubrication. Plus, the ArmorGlide skirt coating helps reduce friction, resist seizure, and operate more quietly, which is a nice touch for a performance build.

This set includes six pistons, the necessary rings, and is designed for a 8.8:1 compression ratio, making them suitable for boosted applications. Keep in mind these are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.