COMP Cams Camshaft CS 252XFI HR-13

This is the COMP Cams CS 252XFI HR-13 hydraulic roller camshaft, designed for Chevrolet Small Block engines ranging from 262 to 400 cubic inches. It's built to give you a noticeable boost in performance, especially in EFI applications where a strong airflow signal is key. This camshaft is a solid choice if you're looking to improve your engine's torque and responsiveness, particularly from idle upwards.

The XFI (Xtreme Fuel Injection) designation means it uses COMP Cams' latest lobe profiles, which are engineered for quick response and improved airflow. This camshaft works well with aftermarket cylinder heads and features a high lift profile. It's specifically tuned for EFI systems, meaning it doesn't rely on the extra signal you might get from a carburetor, allowing for wider lobe separation without sacrificing low-end feel. COMP Cams recommends using a melanized or nitrided distributor gear with this camshaft to ensure proper function and maintain your warranty; cast or steel gears are not compatible without these surface treatments.

This camshaft is intended for engines that can accept a hydraulic roller setup. If your engine block has provisions for roller lifters but doesn't currently have roller components, COMP Cams offers kits to convert it. It's important to verify your engine's setup, as many trucks from the mid-80s to mid-90s still used flat tappet cams even in blocks designed for rollers. This camshaft is not compatible with LT1/LT4 engines or factory roller small blocks newer than 1985.