Mahle MS Piston Set BBC 489ci 4.280in Bore 4.25in Stroke 6.385in Rod 0.990 Pin -3cc 8.6 CR Set of 8

If you're building a high-performance Big Block Chevy engine, specifically a 489 cubic inch displacement with a standard deck height, this Mahle MS Piston Set is a solid choice. These pistons are designed to work with a 4.280-inch bore and a 4.250-inch stroke, commonly paired with a 6.385-inch connecting rod and a 0.990-inch wrist pin. The -3.4cc dish volume contributes to an 8.6:1 compression ratio, making them suitable for a wide range of street and strip applications where pump gas is used.

Mahle is known for well-built engine components, and this set is no exception. Constructed from 4032 aluminum alloy, these pistons offer good strength and thermal expansion properties, which helps maintain proper piston-to-wall clearance as the engine heats up. This material choice is important for durability and performance in demanding engine builds. Each piston weighs approximately 469 grams, which is a reasonable weight for this size and application, contributing to a balanced rotating assembly.

This set includes eight pistons, ready for your next engine build. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications and the manufacturer's installation instructions for proper assembly and tuning.