Mahle MS Piston Sets 461c.i. 4.155bore 4.250stroke 6.8rod 1.285c/h 0.990pin -6ccvol 510g 11.0c/r

If you're building a stroker engine for your Big Block Pontiac, Mahle's MS Piston Set is a solid choice. This set is specifically designed for 461 cubic inch applications, featuring a 4.155-inch bore and a 4.250-inch stroke. The pistons are forged from 4032 aluminum, a material known for its strength and durability, making them well-suited for the demands of a performance stroker build. They come with a -6.4cc dish volume, which helps achieve a 10.9:1 compression ratio with a 6.800-inch connecting rod and a 0.990-inch wrist pin. Each piston weighs in at approximately 529 grams, contributing to a balanced rotating assembly.

Mahle has a long-standing reputation for producing well-built engine components, and these pistons are no exception. The 4032 aluminum alloy offers good thermal expansion properties, which is important for maintaining proper piston-to-wall clearance under varying engine temperatures. This helps to reduce noise and wear over time. The included wrist pins are 0.990 inches in diameter, a common size for many performance connecting rods. This set is intended for serious engine builds where reliability and performance are key.

It's important to note that these pistons are not CARB approved and cannot be shipped to California. They are also subject to Prop 65 warnings. When installing these pistons, ensure you follow the manufacturer's recommended clearances and lubrication procedures for optimal performance and longevity. This set is a critical component for anyone looking to maximize the power and performance of their Big Block Pontiac engine.