Mahle MS Piston Set SBF 434ci 4.155in Bore 4.000in Stroke 1.245 CH 6.25in Rod 10.0 CR - Set of 8

In this set, you get eight Mahle MS forged pistons, designed for a Ford Small Block 434 cubic inch engine. These pistons feature a 4.155-inch bore and are built to work with a 4.000-inch stroke and a 6.250-inch connecting rod. The compression height (CH) is 1.245 inches, and they are designed for a 10.0:1 compression ratio with a -26cc dish volume. Each piston weighs in at approximately 447 grams.

Mahle uses 4032 aluminum alloy for these pistons, which is known for its strength and durability, making it a solid choice for performance builds. This alloy offers good thermal expansion properties, which helps maintain proper piston-to-wall clearance as the engine heats up. The forged construction means these pistons can handle the higher cylinder pressures and temperatures found in performance applications, offering a significant upgrade over cast pistons.

This set is a critical component for rebuilding or upgrading your Ford Small Block engine. Remember 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, especially regarding ring gap, pin fitting, and piston-to-wall clearance.