A set of 1.5 roller rockers for the A-Series. The ultimate lightweight alloy valve gear giving maximum efficiency cutting down side loading on valve stem, reducing friction and wear while increasing rigidity. The 1.5 hi-lift keeps valves open approximately 20% more at any given point, although opening and closing periods remain the same, and vastly improves volimetric effiency and, therefore, power output.
The alloy rockers have hard centerless ground roller tips and PB1 phosphor bronze material bushes on a competition thick-wall shaft, with nuts and EN8 adjuster screws.
These combine in a high quality yet economical roller rocker set, as the roller tip is the most important factor to reduce valve and guode wear when using modern performance cams.
Ensure you tighten down all posts equally to eliminate stress fractures on the shaft if used on small bore heads (not advised) it is necessary to re-arrange the rockers to line up the tps with the valve stems.
We also advise using this spacer kit.
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