Unlock Serious LS1 Performance with COMP Cams Ultra Pro Magnum Rocker Kit (1.80:1, 3/8" Stud Mount)
Take your LS1 build to the next level with the COMP Cams Ultra Pro Magnum Rocker Kit, featuring a 1.80:1 rocker ratio and 3/8" stud mount design. Whether you're chasing more lift, smoother valvetrain motion, or bulletproof reliability, this is the upgrade serious Kiwi builders trust to get the job done right.
Crafted from high-strength chrome-moly steel, these rocker arms offer exceptional durability and deflection resistance—even under high spring pressures and aggressive cam profiles. The increased rocker ratio translates to more valve lift without changing your camshaft, giving your LS1 improved breathing, throttle response, and top-end power.
Perfect for street/strip builds, track-day cars, or dyno warriors, this stud-mount rocker kit is designed to bolt onto aftermarket cylinder heads using 3/8" rocker studs. If you're running higher RPMs and aftermarket cams, this is the rocker system built to keep up without flinching.
Features and Benefits
1.80:1 Rocker Ratio – Increases valve lift and improves airflow without changing your camshaft, boosting overall performance.
Chrome-Moly Steel Construction – Delivers unmatched strength and fatigue resistance, ideal for high-RPM and high-load applications.
3/8" Stud Mount Design – Compatible with aftermarket LS1 heads using 3/8" studs; perfect for serious performance builds.
Reduced Deflection – Maintains accurate valve timing and motion, even under extreme conditions—better reliability and efficiency.
Race-Ready Durability – Built to handle high spring pressures and aggressive cam profiles common in modified LS setups.
Drop-In Upgrade – A bolt-on performance boost for those already running stud-mount heads and upgraded valvetrain components.
Made for NZ Performance Builders
Whether you’re building a weekend weapon, drift car, or drag strip contender, the COMP Cams Ultra Pro Magnum Rocker Kit is engineered to handle New Zealand’s most demanding builds. If you're pushing your LS1 hard, don’t trust your top end to cheap gear—go with the proven strength and precision of COMP Cams.
Technical Specifications
| Specification |
Details |
| Vehicle Fitment |
LS1-based engines with 3/8" stud heads |
| Rocker Ratio |
1.80:1 |
| Mount Type |
Stud Mount (3/8") |
| Material |
Chrome-Moly Steel |
| Construction |
Full roller, ultra low deflection |
| Compatibility |
Aftermarket cylinder heads only |
| Recommended Use |
Street/strip, high-performance LS builds |
REVIEWS
Blake H.
Napier, Hawke’s Bay
★★★★★
"Threw these on my forged LS1 with Trick Flow heads and instantly noticed better top-end pull. Super solid rocker—zero deflection and no lash issues at high RPM. COMP Cams nailed it."
Logan P.
Invercargill, Southland
★★★★★
"Running a big cam and needed rockers that could keep up. These Ultra Pro Magnums handle the load with ease. Fitment was bang-on and the quality is next level. Worth every cent."
