Mahle MS Piston Set Ford 489ci 4.25in Bore 4.250in Stroke 6.7in Rod 0.990 Pin -9cc 12.1 CR Set of 8

Mahle is a well-known name in engine components, recognized for their high-performance pistons and rings used in everything from daily drivers to serious racing applications. This Mahle MS Piston Set is built for Ford FE engines displacing 489 cubic inches, designed for builders looking to achieve a 12.1 compression ratio. These pistons are a solid choice for a performance rebuild where strength and reliability are paramount.

Each piston in this set is forged from 4032 aluminum, a material chosen for its excellent strength-to-weight ratio and thermal expansion properties, which helps maintain proper piston-to-wall clearance as temperatures rise. They feature a 4.250-inch bore and are designed to work with a 4.250-inch stroke and a 6.700-inch connecting rod. The 0.990-inch pin diameter is standard for many performance applications. The -9cc dish volume, combined with other engine components, helps achieve the target 12.1:1 compression ratio, making these pistons ideal for naturally aspirated or forced induction builds seeking significant power gains.

This set includes eight pistons, enough for a complete V8 engine. Please note that these pistons are not CARB approved and cannot be shipped to California. It's always recommended to consult your engine builder or a professional mechanic to ensure these pistons are the right fit for your specific build and to follow proper installation procedures, including checking clearances and using appropriate ring sets and coatings.