Mahle GM 6.6L Duramax 3.898in Stroke 6.417in Rod Perf Pistons w/0.075in Deep Valve Pockets(Set of 8)

Mahle is a well-known name in engine components, recognized for their commitment to quality and performance. This set of eight cast performance pistons is built for the GM 6.6L Duramax engine, specifically for builds aiming for a 3.898-inch stroke with a 6.417-inch rod. These pistons are designed to work with that specific combination, offering a solid foundation for a rebuilt or performance-oriented engine.

Each piston features a 4.055-inch bore and a 1.951-inch compression height, with a 1.358-inch pin diameter. The valve pockets are 0.075 inches deep, which is important for ensuring proper clearance between the piston and valves, especially in modified or high-performance applications. The cast construction offers a good balance of strength and weight, with each piston weighing in at 861 grams. This set is designed for a 16.3 compression ratio, making it suitable for builds where optimized combustion is a goal.

When considering a piston set like this, it's important to note that they are not CARB approved and cannot be shipped to California. This is a significant consideration for residents of that state. For builders working on a GM 6.6L Duramax engine and looking for a specific stroke and rod length combination, these Mahle pistons offer a well-made option to consider for your project.