Mahle MS Piston Set Hemi 426ci 4.09in Bore 4.05in Stk 6.125in Rod .927 Pin -12cc 10.2 CR Set of 8

If you're building or rebuilding a high-performance Hemi 426 cubic inch engine, this Mahle MS Piston Set is a solid choice. Mahle is a well-known name in engine components, and this set is built for demanding applications where reliability and performance are key. These pistons are designed to work with a 4.090-inch bore and a 4.050-inch stroke, featuring a 6.125-inch rod length and a .927-inch pin diameter. The -12cc dish volume contributes to a 10.2:1 compression ratio, which is a popular target for many performance Hemi builds, offering a good balance of power and pump gas compatibility.

Constructed from 4320 material, these pistons are forged, meaning they start as a solid block of aluminum that's heated and hammered into shape. This process creates a much stronger and more durable component than cast pistons, making them well-suited for the stresses of a performance Hemi. Each piston weighs in at 431 grams, which is a notable detail for engine builders focused on balancing rotating assembly components for optimal performance and longevity. The .927-inch pin size is standard for many performance applications, and the 6.125-inch rod length is also a common specification.

This set includes eight pistons, enough for a complete V8 engine. It's important to note that these pistons are not CARB approved and cannot be shipped to California due to emissions regulations. 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 this high-performance piston set.