COMP Cams Camshaft Set F4.6/5.4D XE278A

This is the COMP Cams XE-R camshaft set, specifically the XE278A grind, designed for Ford's 4.6, 5.4, and 5.8 liter Modular 4-valve engines. If you're building a serious performance machine, whether for the track or very limited street use, this camshaft set can make a notable difference in how your engine breathes and performs. It's a hydraulic roller camshaft, meaning it uses roller followers to reduce friction compared to flat tappet designs, allowing for more aggressive lobe profiles and higher lift.

The XE-R series camshafts are built for aggressive performance, featuring a 242-degree intake duration and 240-degree exhaust duration at .050 inch lift, with a .550 inch intake lift and .551 inch exhaust lift. This aggressive profile means you'll need to support it with other upgrades to get the most out of it. Expect to need a larger throttle body, mass air flow sensor, upgraded fuel injectors, and significant exhaust system improvements. For automatic transmissions, a torque converter with a 3000+ RPM stall speed is highly recommended to keep the engine in its power band. This camshaft set is intended for race or limited street applications, and it will result in a very rough idle. A custom tune is absolutely required to properly manage the engine with these cams installed.

This camshaft set fits a wide range of Ford, Lincoln, Mercury, Panoz, and Qvale vehicles, including models like the Ford Mustang, Ford GT, and Lincoln Navigator. Because of the significant changes to engine operation, a custom ECU tune is essential for proper operation and to avoid potential engine damage. Ensure all supporting modifications are in place before installation to maximize performance and reliability.