The Holden Grey motor is often referred to as the Holden side plate. The engine earned its name as they were painted grey from the factory. They came in 2 sizes, 138ci and 132ci. More engineering and after market modifications have gone into this engine than any other engine in Australian automotive history.

January 21, 2016

Grey Motor Yella Terra Roller Rockers

09:12 Posted by Unknown No comments

Holden Grey motor production had almost concluded come the arrival of Perfectune Engineering in 1962. Founder Dave “Dyno” Bennett had worked with the 132.5ci & 138ci refining what would become Perfectune’s only Grey Motor product – one of the acclaimed “Yella Terra” cylinder heads. Perfectune would go on to produce a range of aftermarket performance products for the Red motor which superseded the flagship Grey motor in 1963.



Wind forward 54 years and Perfectune Engineering/Yella Terra is pleased to keep the iconic Aussie legend alive, announcing the release of Holden Grey motor shaft roller rockers. 100% Australian manufactured and designed, the ultimate go-fast-bit for any standard or hopped up Holden Grey motor – 



Complete with fully adjustable aircraft grade extruded aluminium arms, internally lubricating 2-piece shaft and all the necessary mounting hardware to punch life into any Grey 6. No Machining required mounts directly to factory cylinder head and accepts factory cup-end pushrods. Nominal 1.65 ratio.



Equipped with smooth low friction rollers allowing for high revving capability perfect for any street, strip, circuit or hill climbing application. Precision CNC anodized cradle providing unsurpassed rocker stability eliminating premature valvetrain wear and radically reducing side loading.




Yella Terra 
(03) 9555 5522
53 Industrial Dr. Braeside 3195


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