SBM Xtreme Hyd. Roller Cam XR258R-12

The SBM Xtreme Hyd. Roller Cam XR258R-12 by COMP CAMS is a high-performance hydraulic roller camshaft designed for both street and strip applications. It is ideal for automotive enthusiasts and professional builders seeking significant power gains while enjoying the reliability of hydraulic roller technology. This camshaft is perfect for those upgrading small-block engines for weekend track use or building street cruisers that require impressive top-end horsepower.

Engineered with COMP CAMS' proven metallurgy and precision grinding, the XR258R-12 features an aggressive profile that optimizes valve velocity and increases overlap. This design is critical for effectively scavenging exhaust gases and maximizing volumetric efficiency at high RPMs. The roller design also minimizes friction and wear on lifters and pushrods compared to flat-tappet alternatives, ensuring reliable operation in street engines without the complexities associated with solid roller conversions.

Builders should note that the XR258R-12 designation indicates a specific grind that requires matching valve springs, validation of rocker geometry, and careful tuning. This camshaft is not a simple bolt-on upgrade; it is a precision component tailored for informed builders who understand the nuances of performance tuning. With the right setup, the XR258R-12 can unlock the full potential of your engine.