{"product_id":"yella-terra-holden-304-efi-v8-rpm-1-65-shaft-rockers-yt-6797","title":"Yella Terra Holden 304 \/ 5.0L EFI V8 RPM 1.65:1 Shaft-Mount Roller Rockers — YT 6797","description":"\u003cp\u003eYella Terra’s RPM shaft-mount rocker system is a performance replacement for Holden 304 \/ 5.0L EFI V8 engines using VN-style cylinder heads. The 1.65:1 hydraulic full-roller design combines low oscillating mass with a rigid common-shaft layout for street and high-RPM applications.\u003c\/p\u003e\u003ch3\u003eConstruction and valvetrain control\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSet of 16 Australian-manufactured and assembled roller rockers.\u003c\/li\u003e\n\u003cli\u003e1.65:1 rocker ratio with 5\/16 in mounting hardware.\u003c\/li\u003e\n\u003cli\u003eYella Terra rates the set to 400 lb maximum open spring pressure.\u003c\/li\u003e\n\u003cli\u003eOversize full-complement bearings and precision-ground trunnions are designed for oscillating rocker loads.\u003c\/li\u003e\n\u003cli\u003eAircraft-grade aluminium arms reduce valvetrain mass and assist heat dissipation.\u003c\/li\u003e\n\u003cli\u003eHardened chromoly roller tips reduce valve-tip and guide wear.\u003c\/li\u003e\n\u003cli\u003eCommon-shaft mounting increases rocker stability and clamp footprint.\u003c\/li\u003e\n\u003cli\u003eYella Terra states approximately 50% less oscillating nose weight than the factory rocker arrangement.\u003c\/li\u003e\n\u003cli\u003eShim set is included and the system is designed to fit beneath factory rocker covers.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003ePushrod length:\u003c\/strong\u003e Yella Terra advises checking pushrod length when the engine no longer uses a standard camshaft\/lifter combination.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Holden 304 \/ 5.0L EFI V8 combinations using VN-style heads. Confirm valve-train geometry and clearances during installation.\u003c\/p\u003e\u003ch2\u003eSupplier\u003c\/h2\u003e\u003cp\u003eYella Terra\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\u003eSupplier Part Number\u003c\/h2\u003e\u003cp\u003eYT 6797\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":"Default Title","offer_id":43816781283395,"sku":"YT 6797","price":980.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0659\/4883\/files\/untitled_1_of_8__79180.1781059898.jpg?v=1789166463","url":"https:\/\/builtbyboostandtune.com.au\/products\/yella-terra-holden-304-efi-v8-rpm-1-65-shaft-rockers-yt-6797","provider":"BUILT BY BOOST AND TUNE","version":"1.0","type":"link"}