Mercedes CDI Billet Race Piston

Limited quantity available. Pre-order deliveries at the early December. Tested in race cars during the 2026 season.

High-performance billet racing piston designed for high power Mercedes-Benz OM611, OM612, OM613, OM646, OM647, and OM648 CDI engines.

Manufactured for maximum performance and durability, this piston is lighter and stronger than the original factory piston. Its optimized design improves use on high load, the compression ratio is deducted from 18.5:1 to 15.5:1 and is specifically engineered to work with our upgraded performance injectors, ensuring optimal combustion and engine performance.

Features:

• Lightweight and durable billet construction
• Stronger and lighter than OEM pistons
• Improved compression ratio 15.5:1
• Optimized for Black Smoke Performance injectors
• Piston pin included
• Weight save 150g compared to OEM piston and pin
• Allow more boost using stock MLS headgasket

Compatible engines: OM611 / OM612 / OM613 / OM646 / OM647 / OM648

Downsides:

Lower compression ratio smokes gray easier when engine is cold.