Mahle MS Piston Set SBC 433ci 4.155in Bore 4.000in Stroke 6.0in Rod 0.927 Pin 4cc 13.9 CR Set of 8

Mahle's MS Piston Set is built for serious performance builds, specifically targeting the Chevrolet Small Block 434 cubic inch engine. These pistons are forged from 2618 aluminum, a strong material chosen for its ability to withstand high temperatures and pressures common in performance applications. The 4.155-inch bore size is paired with a 4.000-inch stroke and a 6.0-inch connecting rod length, creating a specific displacement and stroke combination designed for optimal power delivery in a 433ci (or 434cid) configuration.

Each piston in this set features a 0.927-inch pin diameter, a standard size for many performance connecting rods. The dish volume is precisely measured at 4cc, which, when combined with the other engine dimensions, results in a 13.9:1 compression ratio. This high compression ratio is intended for naturally aspirated engines seeking maximum power output, especially when paired with high-octane fuel. The pistons weigh in at 459 grams each, a figure that balances strength with rotational mass for improved engine response.

This set includes eight pistons, enough for a complete V8 engine. It's important to note that these pistons are not CARB approved and cannot be shipped to California. They are also subject to California's Proposition 65 warning. For builders aiming for a high-compression, naturally aspirated small block Chevrolet, this Mahle set offers a well-engineered foundation for a powerful engine.