COMP Cams Cam & Lifter Kit LS1 XR273HR

This is the COMP Cams XR273HR hydraulic roller camshaft and lifter kit, designed for GM LS GEN III and IV engines. It's built for street and strip use, aiming to give you more power at higher RPMs. This kit is a popular choice for enthusiasts looking to get more performance out of their LS-based vehicles, whether it's a muscle car like a Camaro or Corvette, or a truck like a Silverado or Tahoe. It's important to note that this camshaft likes higher rocker arm ratios to really shine, and you'll need a compatible engine programmer to adjust for the new cam profile.

Inside this kit, you'll find the camshaft itself, a set of lifters, assembly lube to ensure a smooth break-in, and decals. The camshaft features a 220-degree intake and 224-degree exhaust duration at .050 inch lift, with a .551-inch intake and .551-inch exhaust lift when used with a 1.7 ratio rocker arm. This specific grind is designed to work well with various LS displacements, from 4.8L up to 7.0L, and is tuned for optimal performance in street-driven applications that also see track time. Remember, for best results and to properly manage the engine's computer, you'll need to tune the vehicle after installation.

This kit is a significant upgrade for your LS engine. While it's designed for performance, it's crucial to ensure your vehicle's computer is properly tuned to take full advantage of the camshaft's capabilities. This kit is not CARB approved and cannot be shipped to California. Always refer to the manufacturer's instructions for proper installation and break-in procedures.