Mahle MS Piston Set GM LS 403ci 4.005in Bore 4in Stroke 6.125in Rod .927 Pin -28cc 9.0 CR Set of 8

Mahle is a well-known name in engine components, and this set of forged pistons for GM LS engines is a prime example of their work. If you're building a high-performance 403 cubic inch LS engine, these pistons are designed to handle the demands of increased power and stress. They feature a 4.005-inch bore and are built to work with a 4-inch stroke and a 6.125-inch connecting rod, making them a solid choice for a stroker setup.

These pistons are forged from 2618 aluminum, a material chosen for its strength and ability to withstand high temperatures and pressures common in performance applications. The -25cc dish volume, combined with other engine components, results in a 9.4:1 compression ratio, which is a good balance for many performance builds, offering more power than stock while remaining streetable. Each piston weighs in at 402 grams, helping to keep rotating assembly weight manageable. The .927-inch pin diameter is standard for many performance LS applications.

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. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.