Gray Motor Yella Terra Roller Rockers

Holden Grey motor product had well-nigh concluded come the arrival of Perfectune Engineering in 1962. Founder Dave “Dyno” Bennett had worked alongside the 132.5ci & 138ci refining what would go Perfectune’sec entirely Grey Motor product – ane of the acclaimed “Yella Terra” cylinder heads. Perfectune would get on to produce a range of aftermarket functioning products for the Red motor which superseded the flagship Grey motor inward 1963.

Wind forrard 54 years in addition to Perfectune Engineering/Yella Terra is pleased to keep the iconic Aussie legend live, announcing the loose of Holden Grey motor shaft roller rockers. 100% Australian manufactured too designed, the ultimate become-fast-chip for any touchstone or hopped upwardly Holden Grey motor –

Complete alongside fully adjustable aircraft form extruded aluminium arms, internally lubricating ii-piece shaft as well as all the necessary mounting hardware to punch life into whatever Grey half dozen. No Machining required mounts direct to manufacturing plant cylinder head too accepts mill cup-stop pushrods. Nominal 1.65 ratio.

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