Out of stock
SKU: COM24-278-4
UPC: 036584612469
MPN: 24-278-4
The Mopar 426 Hemi Hydraulic Cam 278H8 from COMP CAMS is a street and strip performance camshaft engineered for serious Mopar enthusiasts who demand reliable mid-range power and drivability. Designed for the legendary 426 Hemi engine platform, this hydraulic flat-tappet cam delivers the balanced lift and duration profile needed for responsive acceleration across everyday and competitive driving conditions. Whether you're building a classic muscle car or restoring a high-performance Mopar, this camshaft provides the foundation for consistent, predictable performance without sacrificing street manners.
This camshaft features a 278-degree duration on both intake and closed exhaust valves, paired with asymmetrical valve lift specifications of 0.502 inches on the intake side and 0.486 inches on the exhaust side, optimizing flow separation and combustion efficiency across the RPM band. The 108-degree lobe separation angle (LSA) promotes cylinder filling while maintaining valvetrain stability, critical for hydraulic lifter systems that rely on precise clearance management. Designed to operate efficiently between 2000 and 5000 RPM, this cam excels in street applications where low-end torque and mid-range responsiveness matter most, reducing the likelihood of valve float while maintaining reliable oil pressure management through the hydraulic actuators.
The Mopar 426 Hemi Hydraulic Cam 278H8 suits builders targeting street or strip duty who prioritize cam longevity and consistent performance over extreme high-RPM extensions. Its hydraulic design eliminates the need for manual valve lash adjustment, simplifying installation and maintenance on original or period-correct Mopar engine builds. Direct fitment is confirmed for 426 Hemi platforms; verify your block, lifter type, and valve train geometry before purchase to ensure proper clearance and optimal results. This single camshaft (sold individually) pairs with matching flat-tappet lifters and quality pushrods for reliable, trouble-free operation.
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