COMP Cams XFI RPM cam and lifter kits are designed to provide an excellent increase in your ride's performance. Featuring the newest and quickest lobe profiles, these kits are tuned for use in EFI applications, where the extra airflow signal through a carburetor is not required. COMP Cams XFI RPM kits include matching lifters for the ultimate in performance. These kits are great for use with aftermarket cylinder heads.