Mahle MS Piston Set BMW S52B 86.60mm Bore 89.6mm Stroke 135mm Rod 22mm Pin -5cc 12.5 CR Set of 6

If you're rebuilding the top end of your BMW S52 3.2L engine, a solid set of pistons is crucial for reliable performance. This Mahle MS Piston Set is built with 4032 aluminum, a material known for its strength and ability to handle the heat and stress of a performance engine. These pistons are designed for an 86.60mm bore and feature a -5cc dish volume, which helps achieve a 12.5:1 compression ratio when paired with the specified stroke and rod length. This higher compression ratio can lead to improved throttle response and overall power output.

Mahle has engineered these pistons with a 135mm rod length and a 22mm wrist pin, ensuring proper fitment and integration with your engine's rotating assembly. Each piston weighs in at 342g, contributing to a balanced rotating assembly which is key for smooth operation and longevity, especially in modified engines. The 4032 aluminum construction offers good thermal expansion properties, making them a durable choice for builds that see regular use or track time.

This set includes all six pistons needed for a complete engine rebuild. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures, especially when dealing with critical engine components like pistons.