Mahle MS Piston Set GM LT1 428ci 4.130in Bore 4in Stk 6.125in Rod .927 Pin -6cc 12.4 CR Set of 8

These Mahle MS forged pistons are built for serious performance, featuring a -6.1cc dish volume that helps achieve a 12.7:1 compression ratio with LT 6.2L flat-top pistons. This specific design is intended for GM LT1, L86, and LT4 cylinder heads, allowing for a 429 cubic inch displacement when paired with a 4.000-inch stroke crankshaft and a 6.125-inch connecting rod. The pistons themselves have a 4.130-inch bore and a 4.000-inch stroke, with a compression height of 1.105 inches, ensuring proper geometry within the engine block.

Crafted from 2618 aluminum alloy, these pistons are known for their strength and durability under high stress, making them a solid choice for builds aiming for significant power gains. Each piston weighs approximately 457 grams, contributing to a well-balanced rotating assembly. The .927-inch wrist pin diameter is standard for many performance applications, and the pistons are designed to work with the specified rod length to achieve the desired compression and piston-to-valve clearance. This set includes eight pistons, providing everything needed for a complete engine rebuild on your GM LT1-based engine.

When rebuilding your top end with these pistons, ensure you have the correct supporting components. Mahle is a well-known name in engine components, and this piston set is designed to meet the demands of high-performance applications. Please note that this part is not CARB approved and cannot be shipped to California. Always consult your engine builder or Mahle's technical documentation for specific installation requirements and compatibility details.