Mahle MS Piston Set Ford EcoBoost 2.3L Bore 87.51mm Stroke 94mm Rod 149.3mm Pin -6.5cc Set of 4

Mahle is well-known for making solid engine components, and this MS Piston Set for the Ford EcoBoost 2.3L is a great example of their work. If you're rebuilding the engine in your EcoBoost, especially if you're looking to handle more power or just want a robust replacement, these pistons are a serious consideration. They're built with 4032 aluminum, which is a strong choice for performance applications because it has a lower expansion rate than other aluminum alloys, meaning it holds its shape better under heat and stress. This helps maintain tighter tolerances and can lead to a longer-lasting engine.

This set is designed with a bore of 87.51mm and a 94mm stroke, featuring a 149.3mm rod length and a 22.5mm pin. The -6.5cc dish volume contributes to a 9.5:1 compression ratio, which is a common target for modified engines that still need to run on pump gas. Each piston weighs in at 365g, keeping rotating mass manageable. These are forged pistons, meaning they start as a solid block of aluminum that's heated and hammered into shape under immense pressure. This process creates a much denser and stronger grain structure compared to cast pistons, making them more resistant to cracking and deformation, especially under high cylinder pressures.

When you're putting together a performance EcoBoost engine, the pistons are a critical component. Mahle's MS series offers a well-built option that balances strength, weight, and thermal properties. Keep in mind 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.