factory main bolts are prone to stretching and deforming

This makes them suitable for use in engines with upgraded turbochargers or other modifications that can generate increased heat

The Pro-Xtreme design is specifically tailored to handle up to 2000 horsepower

hard anodized brackets

BMW M54 Stroker Kit by 5150 AutoSport Compression Ratio:9.5:1 factory main bolts are proneBigger displacement, more torque and more power: Our 5150 Autosport 3. 2L 3. 4L BMW M54 Stroker Kit is specifically designed for BMW M54B22, M54B25, and M54B30 engines. Utilizing CP Carrillo Pro Xtreme Forged Pistons and Manley Performance Connecting Rods, as well as the 5150 4340 Billet Steel Crankshaft, this kit has stood up to the tests and trials of high horsepower application time and time again. We only sell you the products that we have used