• Bore (mm): 99.50 / 99.75 /100
• Stroke (mm): 79
• Connecting rod length (mm): 130.5
• Compression ratio: 8.5
• Axle diameter (mm): 23
• Shaft height (mm): 30.7

Mahle Motorsport PowerPak pistons are engineered from a specific aluminum alloy for reduced cylinder play, excellent temperature stability, and excellent resistance to detonation. Each kit comes with a set of Mahle Motorsport high performance rings.

Features of Mahle Motorpsort Pistons

• CNC machined high performance forged pistons
• Light and strong Mahle forges
• Grafal® anti-friction treatment on skirts*
• “Phosphate” treatment to reduce micro seizures**
• High quality reinforced axles
• Competition clips
• “Low friction” ring clearance
• Manual finishing of each piston

* GRAFAL® Mahle treatment reduces friction, wear and operating noise.

**Phosphate treatment provides the gray appearance of Mahle pistons. This dry lubricant allows the piston pins and ring grooves to be lubricated before the engine reaches its operating temperature, very useful during start-up and/or running-in periods to prevent micro seizures.