SKU: COM1261-12
UPC: 036584320456
MPN: 1261-12
The COMP CAMS Hi-Energy Rocker Arms for Chevy Inline-6 engines with 1.75 ratio deliver optimized valvetrain geometry designed to increase valve lift and duration while maintaining reliable mechanical advantage. This 12-piece set features 3/8-inch stud mounts engineered for direct bolt-on installation on standard Chevy inline-6 cylinder heads, making it a bolt-in solution for builders seeking measurable performance gains without extensive cylinder head modifications.
The 1.75:1 ratio is the standard mechanical advantage specification for inline-6 applications, translating camshaft motion into proportionally increased valve opening at the seat. This ratio strikes a balance between valve velocity and load on the valvetrain components—critical for street and mild performance builds where reliability and repeatability matter. The 3/8-inch stud diameter provides the standard mounting interface for Chevy inline-6 rocker arm pedestals, ensuring compatibility with factory and common aftermarket cylinder head packages. A complete 12-piece set covers a full six-cylinder engine without substitution or mixing ratios.
This rocker arm package is suited for classic Chevy inline-6 engine builds—from 194 to 250 cubic-inch displacement engines—where the objective is measurable power delivery across the RPM range without requiring a full top-end rebuild. Typical applications include street restorations, vintage truck performance upgrades, and foundational valvetrain improvements before aggressive cam or head work. COMP CAMS' rocker arms are manufactured to tight tolerances, ensuring consistent ratio geometry across all 12 pieces and reducing variability in valve timing across cylinders.
Buyers should verify compatibility with their specific cylinder head casting and confirm that current pushrods and valve geometry will function correctly with the upgraded rocker ratio before installation. Proper adjustment and preload setup during installation is essential to valvetrain longevity and performance.
WARNING ⚠️
You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
Purchasing a Firearm? Click HERE to see our firearm purchasing guide.
