Designed for high revving street/strip applications. No other comparable product can compete with 600lbs* maximum open spring pressure whilst retaining factory size bolt-down hardware. Manufactured and assembled in Australia using the highest quality materials and componentry consistent with those found in our Platinum race series. Our wide range of true ratios allows you to achieve high lift without relying solely on your camshaft… a trend many engine builders and racers alike are adopting to relieve the inertia on lifters and pushrods generated by aggressive and often violent ramp rates required to make big lift. Ideal for harsh street and strip applications, especially in place of the factory stamped steel GMH rockers that have seen decades of wear and tear. These rockers have got what it takes to last! Specifications: PART NO: YT 5033 MAKE: HOLDEN MODEL: All early style Pre-EFI heads to 1988 SERIES: N/A ENGINE: 253 4.2L| 308 5.0L V8 YEAR: 1969-1988 PART TYPE: ROLLER ROCKERS MOUNTING STYLE: SHAFT TYPE ROCKER ARM RATIO: 1.65 STUD SIZE: 5/16 ADJUSTABLE: ADJUSTABLE HYDRAULIC - ROCKER ARM STYLE: FULL ROLLER SHIMS INCLUDED : YES ROCKER MATERIAL: ALUMINIUM SELF-ALIGNING: NO ROCKER ARM BODY STYLE: STANDARD ROCKER ARM NUT STYLE: CAPSCREW MAX SPRING DIAMETER: 1.437 MAX OPEN SPRING PRESSURE: INLET OFFSET - QTY: SET OF 16 BRAND: PRO STREET NOTE: Easy Fit bolt-on. No machining required.
Designed for high revving street/strip applications. No other comparable product can compete with 600lbs* maximum open spring pressure whilst retaining factory size bolt-down hardware. Manufactured and assembled in Australia using the highest quality materials and componentry consistent with those found in our Platinum race series. Our wide range of true ratios allows you to achieve high lift without relying solely on your camshaft… a trend many engine builders and racers alike are adopting to relieve the inertia on lifters and pushrods generated by aggressive and often violent ramp rates required to make big lift. Ideal for harsh street and strip applications, especially in place of the factory stamped steel GMH rockers that have seen decades of wear and tear. These rockers have got what it takes to last! Specifications: PART NO: YT 5033 MAKE: HOLDEN MODEL: All early style Pre-EFI heads to 1988 SERIES: N/A ENGINE: 253 4.2L| 308 5.0L V8 YEAR: 1969-1988 PART TYPE: ROLLER ROCKERS MOUNTING STYLE: SHAFT TYPE ROCKER ARM RATIO: 1.65 STUD SIZE: 5/16 ADJUSTABLE: ADJUSTABLE HYDRAULIC - ROCKER ARM STYLE: FULL ROLLER SHIMS INCLUDED : YES ROCKER MATERIAL: ALUMINIUM SELF-ALIGNING: NO ROCKER ARM BODY STYLE: STANDARD ROCKER ARM NUT STYLE: CAPSCREW MAX SPRING DIAMETER: 1.437 MAX OPEN SPRING PRESSURE: INLET OFFSET - QTY: SET OF 16 BRAND: PRO STREET NOTE: Easy Fit bolt-on. No machining required.

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