Wiseco BMW S50B32 3.2L 24V Turbo Bore (86.5mm) - Size (+.10) - CR (8.8) Euro 21mm Pistons

These Wiseco forged pistons are built for the 1996-1999 BMW M3 with the S50B32 3.2L 24V engine. If you're looking to rebuild or upgrade your engine for higher performance, especially with forced induction like turbocharging, these pistons are a solid choice. They feature a specific bore size of 86.5mm, which is a +.010 inch increase over stock, and a compression ratio of 8.8:1, making them well-suited for boosted applications where you need to manage detonation.

Wiseco is known for its well-built forged pistons, and these are no exception. Forging is a process that creates a stronger, more durable piston compared to cast aluminum, able to withstand the increased cylinder pressures and temperatures that come with turbocharging or supercharging. The 21mm wrist pin size is also a key detail for ensuring proper fitment with your connecting rods. These pistons are designed to handle the demands of a performance-oriented engine build, offering improved reliability under stress.

When installing these pistons, remember they are a performance upgrade and may require professional machine work on your engine block to achieve the correct bore and piston-to-wall clearance. It's always recommended to consult the manufacturer's detailed installation instructions and work with a qualified engine builder to ensure optimal performance and longevity for your S50B32 engine.