Mahle MS Piston Set Por 2.5L 100.5mm Bore 78.9mm Stroke 150mm Rod 24mm Pin -21cc 8.5 CR Set of 4

This Mahle MS Piston Set comes with four forged pistons, each designed for a 2.5L engine application. You get pistons with a 100.5mm bore, a 78.9mm stroke, and a 150mm connecting rod length. The wrist pin diameter is 24mm, and each piston features a -21cc dish volume, resulting in an 8.5:1 compression ratio. These pistons are built for performance and durability in demanding engine builds.

Mahle is a well-known name in engine components, and these forged pistons are a solid option for rebuilding or upgrading your engine. Forged pistons are generally stronger and more heat-resistant than cast pistons, making them suitable for higher performance applications where increased cylinder pressures and temperatures are expected. The specific dish volume and pin height are critical for achieving the desired compression ratio and piston-to-valve clearance, especially when working with modified cylinder heads or camshafts. It's important to 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.

When undertaking an engine rebuild of this caliber, ensure you have all the necessary supporting components. This includes new piston rings, connecting rod bearings, and main bearings, as well as a complete gasket set. Proper balancing of the rotating assembly is also highly recommended for optimal engine longevity and smooth operation. If you're unsure about any aspect of the installation or component selection, consulting with a professional engine builder is always a good idea.