HOLDEN 6 PRO STREET 1.6 SHFT MNT 5/16"(HYD)

Holden 6 – Pro Street Rocker Arm Kit

Engineered for High-Revving Street & Strip Power

Hi Ratio

The Pro Street series is built for serious street and strip enthusiasts who demand performance, reliability, and endurance. No other comparable rocker system delivers up to 600 lbs maximum open spring pressure* while retaining the convenience of factory-size bolt-down hardware.

Proudly manufactured and assembled in Australia, the Pro Street range utilises the same premium-grade materials and precision components found in our renowned Platinum Race Series.

Our extensive range of true ratio options lets you achieve additional valve lift without relying solely on aggressive camshaft profiles. This approach is now preferred by many top engine builders as it reduces the inertia and stress placed on lifters and pushrods caused by extreme ramp rates.

Ideal for high-performance street or strip applications, especially as a robust upgrade from the factory stamped steel GMH rockers that have long exceeded their service life — the Pro Street rockers are built to last and perform.

Why Choose Pro Street?

• Extreme Durability – Withstands up to 600 lbs maximum open spring pressure*.

• Precision Bearings – Oversize, full-complement caged bearings built for oscillating (rocking) motion, paired with precision-ground trunnions for reduced friction and long service life.

• CNC-Balanced Billet Arms – Ensures superior valvetrain stability and engine harmony under high load and RPM.

• Aircraft-Grade Aluminium Construction – Excellent strength-to-weight ratio and superior heat dissipation.

• Bolt-On Shaft Mount System – Mounts inlet and exhaust rockers to a common shaft, doubling footprint and clamp load without cylinder head modification.

• Multiple Ratio Options – Tailored for both stock and performance camshafts to achieve higher lift with less stress.

• Hardened Roller Tips – Chrome-moly steel roller tips with secure internal circlips prevent valve tip and guide wear, ensuring quieter operation and consistent lash control.

Built for performance. Proven on the street. Dominant on the strip. Easy Fit  Shaft - Non Adjustable - Suitable for HYDRAULIC camshafts

The original "bolt on" rocker. Simply remove old rocker gear and replace with the shaft assembly that bolt onto the original mounting holes with no modification. Tremendous rigidity 

ITEM SPECIFICS