Wiseco BMW M50B25 2.5L Engine 11:1 CR 84.00MM Bore Custom Pistons (Set of 6)

If you're rebuilding the engine in your 1991-1995 BMW 525i, 325is, or 525iT, these Wiseco forged pistons are a solid choice for a high-performance build. Designed specifically for the M50B25 2.5L engine, they offer an 11:1 compression ratio with an 84.00mm bore, giving your engine a significant boost in power and responsiveness. These aren't your average replacement pistons; they're built for serious work.

Wiseco crafts these pistons from 2618 aluminum right here in the USA, chosen for its improved tensile strength, which is crucial when you're pushing an engine hard. They feature precision-machined ring grooves, an anti-detonation groove, and other features designed to improve ring seal and prevent detonation. The crown is fully machined for accuracy, and they even come with forced pin oiling to keep things well-lubricated. Plus, the ArmorGlide skirt coating helps reduce friction and noise while resisting seizure, making them well-suited for heavy to severe duty applications.

This set includes six pistons, rings, and pins, ready for installation. Keep in mind these pistons are not CARB approved and cannot be shipped to California. For builds demanding more from the M50 engine, these Wiseco pistons are a well-built option.