AMC/Jeep 4.0L Hyd Cam Xtreme EFI 4x4

The AMC/Jeep 4.0L Hyd Cam Xtreme EFI 4x4 from COMP CAMS is a high-performance hydraulic roller camshaft engineered for modern fuel-injected Jeep and AMC 4.0L inline six engines running in four-wheel-drive applications. This cam profile is purpose-built for enthusiasts and mechanics seeking to unlock additional horsepower and torque without sacrificing the smooth, reliable operation that hydraulic lifter systems provide. Whether you're upgrading a TJ, XJ, or ZJ platform or restoring a classic AMC powerplant with EFI conversion, this camshaft delivers the aggression needed for off-road performance while maintaining factory compatibility with existing hydraulic valve train architecture.

COMP CAMS engineered the Xtreme EFI profile with optimized valve timing, duration, and lift characteristics specifically calibrated for electronic fuel injection systems. The hydraulic design eliminates the complexity and expense of solid roller conversions—no need for pushrod adjustments or lifter preload tuning. Advanced lobe geometry improves cylinder fill and exhaust scavenging, translating to measurable gains in mid-range power delivery and top-end RPM performance. The Xtreme grind balances aggressive overlap and lift with the thermal stability demanded by 4x4 duty cycles, where extended low-speed crawling and sustained climbing require reliability over pure racing redline. Built to OEM manufacturing tolerances, this camshaft pairs seamlessly with your 4.0L's existing valve springs, rockers, and fuel injection mapping.

This camshaft is ideal for Jeep 4x4 builders, engine rebuilders, and off-road enthusiasts upgrading tired stock cam profiles or converting naturally aspirated mills to forced-induction platforms later. Installation requires standard engine-out service with proper valve lash verification post-install; no specialized equipment or lengthy dyno tuning sessions needed. Compatibility spans all 4.0L engines equipped with hydraulic valve lifters and EFI systems, including those in Wranglers, Cherokees, Comanches, and Jeep 4x4 engine swaps. For best results, pair this cam with matched intake and exhaust work to maximize the flow improvements and breathing potential it unlocks.