COMP Cams Camshaft CBVI XR271HR-12

This COMP Cams Xtreme Energy hydraulic roller camshaft features a 224 intake and 232 exhaust duration at .050 inch lift, specifically tuned for computer-controlled Chevrolet Big Block Gen VI engines. This camshaft is designed to work well with ported cylinder heads, making it a serious upgrade for those looking to extract more performance from their engine. It's built for applications that demand more from the valvetrain and require a higher stall speed torque converter.

The XR271HR-12 is a hydraulic roller camshaft, which means it uses roller followers to reduce friction compared to flat tappet designs. This allows for more aggressive lobe profiles, leading to improved performance. For this camshaft to perform optimally and reliably, a serious valve train upgrade is necessary, including components like upgraded lifters, pushrods, and valve springs that can handle the increased lift and faster ramp rates. You'll also need a torque converter with a stall speed of 2200 RPM or higher to effectively utilize the powerband this cam creates, along with a programmer to adjust engine parameters for the new cam profile.

This camshaft fits a range of Chevrolet and GMC trucks and vans from 1996-2000, including models like the C2500 Suburban, K2500, and Express 3500. It's a substantial upgrade for your Big Block Gen VI, offering a noticeable change in power delivery when paired with the appropriate supporting modifications. Remember that this camshaft is not CARB approved and cannot be shipped to California.