COMP Cams Camshaft CRH XR286HR-10 66-71 Chrysler 426 Hemi 8 Cyl

This is the COMP Cams XR286HR-10 Xtreme Energy hydraulic roller camshaft, specifically designed for the legendary 1966-1971 Chrysler 426 HEMI V8 engine. If you're looking to wake up that big block Mopar and get more out of it, this camshaft is a solid choice. It features a quicker valve opening and a more aggressive lift curve compared to older, factory grinds, which translates directly into increased responsiveness and a noticeable bump in both torque and horsepower. COMP Cams engineered this profile to boost performance without making the car undrivable, meaning you'll still have enough vacuum for essential accessories like power brakes.

The Xtreme Energy series is known for delivering real gains, especially when paired with supporting modifications. For this camshaft, COMP Cams recommends a gear ratio of 3.91 or lower, a torque converter with at least a 2800 RPM stall speed, and a compression ratio of 9.5:1 or higher. You'll also want to ensure you have headers and a free-flowing exhaust system to let the engine breathe. While it works well with carbureted setups, you'll see the best results when combined with an aftermarket intake manifold. Be aware that this camshaft has a rougher idle than stock, which is typical for performance grinds of this nature, and it is not CARB approved, so it cannot be shipped to California.

When installing this camshaft, consider that it's a significant upgrade for your HEMI. It's designed for enthusiasts who want a more potent engine and are willing to make the necessary supporting modifications to achieve it. This camshaft is a key component for building a more powerful and responsive 426 HEMI.