Mahle MS Piston Set BBF 544ci 4.39in Bore 4.5in Stroke 6.7in Rod 0.990 Pin -38cc 9.7 CR Set of 8

This Mahle MS Piston Set is built for Ford Big Block engines, specifically for a 521 cubic inch displacement. You get a complete set of eight forged pistons, each designed with a 4.39-inch bore and a 4.5-inch stroke. These pistons are engineered to work with a 6.7-inch connecting rod and feature a 0.990-inch pin diameter. The dish volume is -38cc, which results in a compression ratio of 9.7:1 when paired with the right cylinder heads and gasket combination.

Mahle uses a 4032 aluminum alloy for these pistons, known for its strength and durability, especially in high-performance applications. Each piston weighs approximately 506 grams. The 4.390-inch bore size is a key specification for achieving the 521 cubic inch displacement from the 4.5-inch stroke. This set is a solid option for builders looking for well-made internal engine components for a performance Big Block Ford build.

It's important to note that this piston set is not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications and the manufacturer's installation instructions for proper assembly and tuning to achieve the best results from these components.