Mahle MS Chevrolet Small Block 434cid 4.155 x 1.000CH 6.0cc 14.3CR Pistons - Set of 8

Mahle's MS series pistons start with a 2618 aluminum alloy, a material known for its strength and ability to handle high temperatures and pressures, making it a solid choice for performance builds. These pistons are specifically designed for Chevrolet Small Block engines, aiming for a 434 cubic inch displacement with a 4.155-inch bore and a 4.000-inch stroke. The 1.000-inch wrist pin bore and 6.000-inch rod length are key dimensions that work together to achieve the desired compression ratio and stroke combination.

With a 6.0cc valve relief volume, these pistons are engineered to provide clearance for your valves, crucial for preventing interference at high RPMs. This design contributes to a calculated compression ratio of 14.3:1, which is on the higher side and typically suited for race applications or engines running high-octane fuel. Each piston weighs in at 433 grams, a weight that balances strength with rotational mass considerations for performance engines.

This set includes eight pistons, along with the necessary wrist pins and locks, ready for installation. It's important to note that these pistons are not CARB approved and cannot be shipped to California. For optimal performance and longevity, ensure you consult with your engine builder or refer to Mahle's detailed installation guidelines, as precise balancing and ring gap setting are critical for this level of performance component.