Mahle MS Piston Set BMW S54 B32 87.50mm Bore 91.0mm Stroke 139mm Rod 21mm Pin -9.2cc 12.5CR Set of 6

This Mahle MS Piston Set includes six forged pistons designed for the BMW S54 B32 engine. You get pistons with an 87.50mm bore, a 91.0mm stroke, and a 139mm rod length, featuring a 21mm wrist pin. These pistons are crafted from 2618 aluminum, known for its strength and durability under high stress, and come with a TBC coating to help reduce friction. With a dish volume of -9.2cc, they are designed to achieve a 12.5:1 compression ratio, which is a notable increase over stock and will significantly impact the engine's power output.

Each piston weighs 357g, contributing to a well-balanced rotating assembly. The 2618 aluminum construction is a solid choice for performance builds where reliability under demanding conditions is key. The TBC (Thermal Barrier Coating) on the piston crown helps to reflect heat away from the combustion chamber, which can aid in preventing detonation and maintaining consistent performance. This set is intended for engine builders looking to rebuild or significantly upgrade their S54 engine for increased performance.

It's important to note that these pistons are not CARB approved and cannot be shipped to California. For installation, always refer to the manufacturer's detailed instructions to ensure proper fitment and performance. This set is a substantial component for a high-performance engine build, so ensure all supporting components are up to the task.