BB Mopar Extreme Energy Cam CRBXE274H-10

The COMP CAMS BB Mopar Extreme Energy Cam (CRBXE274H-10) is a hydraulic flat-tappet camshaft engineered for high-revving small-block and big-block Mopar B and RB-series engines. This cam delivers aggressive valve lift and extended duration, making it the centerpiece of builds targeting increased horsepower and torque across a broad RPM band while maintaining the simplicity and cost-effectiveness of hydraulic valve actuation. With a 0.488-inch intake lift and 0.491-inch exhaust lift, paired with 274-degree intake and 286-degree exhaust duration at 0.050-inch valve lift, this profile is sized for serious street and strip applications where reliable mid-range power and sustained high-RPM performance matter.

The 110-degree lobe separation angle (LSA) positions this cam in the overlap-optimized range, balancing street manners with aggressive scavenging at elevated RPM. The 1800–6000 RPM powerband reflects a design intent for engines capable of sustained high revs without sacrificing low-end responsiveness. Hydraulic flat-tappet design keeps costs lower than roller or solid-lifter alternatives while offering proven durability in Mopar platforms. COMP CAMS' Xtreme Energy series is known for precise valve timing control and consistent lobe profiles across production runs, critical factors when tuning fuel mixture and ignition timing around a specific cam curve.

This cam suits builders restoring or upgrading Mopar B/RB engines for bracket racing, street rods, muscle car restorations, and dyno-focused street machines. It is one component in a larger engine tuning package—proper valve springs, pushrods, rocker geometry, fuel curve, and ignition timing must be validated for the intended application. Builders should confirm compatibility with their specific year and displacement before installation and consult COMP CAMS' application guides and dyno data for final carburetor and ignition calibration recommendations.