Chevy 348/409 XE Hyd Roller Cam XE284HR10

The COMP CAMS Chevy 348/409 XE Hydraulic Roller Cam (Part #48-802-11) is a high-lift, high-duration camshaft engineered for big-block Chevrolet engines demanding aggressive valve timing and increased airflow. This Xtreme Energy hydraulic roller cam delivers 0.555-inch intake and 0.560-inch exhaust lift across a 284/290-degree duration window, optimized for performance between 1800 and 6200 RPM with a 110-degree lobe separation angle. It represents the kind of precision engineering required to extract maximum power from classic and modern big-block Chevy platforms.

The 110 LSA centerline balances streetability with serious performance gains. At 1800 RPM, the cam maintains stable idle characteristics typical of hydraulic roller designs, while the upper RPM range extends to 6200 for applications demanding extended power delivery. The asymmetric lift profile—slightly higher exhaust lift than intake—improves scavenging and helps manage backpressure. Hydraulic roller technology provides the reliability advantage over solid roller designs when proper maintenance protocols are followed, making this cam suitable for both street and controlled track duty.

This camshaft is purpose-built for big-block Chevrolet 348 and 409 platforms where displacement and cubic inches demand increased valve motion to support peak output. Buyers installing this cam should verify compatibility with their existing valvetrain geometry and confirm that pushrods, rocker arms, and associated hardware are rated for the lift specifications. The XE Xtreme Energy line positions this cam in COMP CAMS' performance tier—above entry-level profiles but with room in the RPM band for drivability. Installation should follow COMP CAMS documentation precisely, including proper break-in procedures.