Mahle MS Piston Set Chevy Small Block 438ci 4.175in Bore 4.00Stk 6.0in Rod .927 Pin 6.0cc Set of 8

Mahle is a well-known name in engine components, especially for their piston technology. This Mahle MS Piston Set is built for serious performance builds on a Chevy Small Block engine, specifically for a 438 cubic inch displacement. If you're assembling a high-performance engine where reliability and precise tolerances are key, these pistons are designed to meet those demands.

These are forged pistons, which means they start from a solid block of aluminum alloy and are heated and hammered into shape. This process creates a much stronger and more durable piston than cast ones, making them ideal for engines that will see high RPMs, boosted applications, or heavy loads. The bore size is 4.175 inches, with a 4.000-inch stroke and designed to work with a 6.000-inch connecting rod. The pin diameter is .927 inches. The dish volume is 6.0cc, which contributes to a compression ratio of 14.4:1 with the specified components. Each piston weighs in at 441 grams, offering a good balance of strength and weight for performance.

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. They also come with a Prop 65 warning. Ensure you check all manufacturer specifications and consult with your engine builder to confirm these pistons are the right fit for your specific build before installation.