{"product_id":"yella-terra-holden-304-5-0-efi-platinum-1-65-shaft-rockers-yt6030","title":"Yella Terra Holden 304 \/ 5.0L EFI V8 Platinum 1.65:1 7\/16 Shaft-Mount Roller Rockers","description":"\u003cp\u003eYella Terra’s Platinum 1.65:1 shaft-mount race rocker system is the heavy-duty wide-body option for Holden EFI V8 engines using VN-style cylinder heads. It is intended for combinations requiring substantially greater valvetrain stiffness and spring capacity than the lighter street-oriented rocker families.\u003c\/p\u003e\u003ch3\u003ePlatinum race construction\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSet of 16 adjustable full-roller aluminium rocker arms.\u003c\/li\u003e\n\u003cli\u003e1.65:1 rocker ratio.\u003c\/li\u003e\n\u003cli\u003eWide-body aircraft-grade aluminium arms for increased strength and resistance to deflection.\u003c\/li\u003e\n\u003cli\u003eSupplier-rated to 900 lb maximum open spring pressure.\u003c\/li\u003e\n\u003cli\u003eOversize full-complement caged bearings and precision-ground trunnions.\u003c\/li\u003e\n\u003cli\u003eHardened chromoly roller tips.\u003c\/li\u003e\n\u003cli\u003eHeavy-duty 7\/16-inch shaft-mount hardware.\u003c\/li\u003e\n\u003cli\u003eMaximum spring diameter: 1.550 in.\u003c\/li\u003e\n\u003cli\u003eShim set included.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRequired cylinder-head machining\u003c\/h3\u003e\u003cp\u003eYella Terra specifies removing approximately 0.300 in from the rocker pads and drilling\/tapping the mounting points to 7\/16-inch UNC for the Platinum system. Professional installation and geometry checking are strongly recommended.\u003c\/p\u003e\u003ch3\u003eHardware configurations\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eYT 6030:\u003c\/strong\u003e 2.0-inch 7\/16-inch capscrews and standard pedestal arrangement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYT 6030A:\u003c\/strong\u003e 2.25-inch 7\/16-inch capscrews with 25 mm pedestals; Yella Terra identifies this as a common upgrade for aftermarket alloy heads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYT 6030B:\u003c\/strong\u003e 2.5-inch 7\/16-inch capscrews with 30 mm pedestals.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Holden 304 \/ 5.0L EFI V8 combinations using VN-style cylinder-head architecture. Select the hardware\/pedestal configuration to match the actual cylinder head and machining.\u003c\/p\u003e\u003ch2\u003eProduct System\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eEngine Parts\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHolden Commodore Vn Vr 5 0 Efi V8\u003c\/li\u003e\n\u003cli\u003eHolden Commodore Vs 5 0 Efi V8\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eConfirm chassis, engine, drivetrain and production-year compatibility before ordering.\u003c\/p\u003e\u003ch2\u003eAvailable Options\u003c\/h2\u003e\u003ch3\u003eHardware \u0026amp; Pedestal Configuration\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYT6030 — 2.0in Capscrews + Standard Pedestals\u003c\/li\u003e\n\u003cli\u003eYT6030A — 2.25in Capscrews + 25mm Pedestals\u003c\/li\u003e\n\u003cli\u003eYT6030B — 2.5in Capscrews + 30mm Pedestals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSupplier Part Numbers\u003c\/h2\u003e\u003cp\u003eYT 6030, YT 6030A, YT 6030B\u003c\/p\u003e\u003ch2\u003eBuilt by Boost \u0026amp; Tune Support\u003c\/h2\u003e\u003cp\u003eBBT can assist with fitment review, installation, supporting modifications, configuration and calibration requirements where applicable.\u003c\/p\u003e","brand":"Yella Terra","offers":[{"title":"YT6030 — 2.0in Capscrews + Standard Pedestals","offer_id":43817098575939,"sku":"YT 6030","price":1550.0,"currency_code":"AUD","in_stock":true},{"title":"YT6030A — 2.25in Capscrews + 25mm Pedestals","offer_id":43817098608707,"sku":"YT 6030A","price":1550.0,"currency_code":"AUD","in_stock":true},{"title":"YT6030B — 2.5in Capscrews + 30mm Pedestals","offer_id":43817098641475,"sku":"YT 6030B","price":1550.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0659\/4883\/files\/IMG_8601__02208.1683180204.jpg?v=1789169787","url":"https:\/\/builtbyboostandtune.com.au\/products\/yella-terra-holden-304-5-0-efi-platinum-1-65-shaft-rockers-yt6030","provider":"BUILT BY BOOST AND TUNE","version":"1.0","type":"link"}