{"product_id":"yella-terra-holden-304-5-0-efi-pro-street-1-65-shaft-rockers-yt6309","title":"Yella Terra Holden 304 \/ 5.0L EFI V8 Pro Street 1.65:1 Shaft-Mount Roller Rockers — YT 6309","description":"\u003cp\u003eYella Terra’s Pro Street shaft-mount roller rocker system is designed for high-revving street and strip Holden EFI V8 combinations using VN-style cylinder heads. The 1.65:1 adjustable full-roller design uses the heavy-duty bearing and trunnion architecture derived from Yella Terra’s Platinum race series.\u003c\/p\u003e\u003ch3\u003ePro Street 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\u003eSupplier-rated to less than 600 lb maximum open spring pressure.\u003c\/li\u003e\n\u003cli\u003eOversize full-complement caged bearings and precision-ground trunnions are designed for oscillating rocker loads.\u003c\/li\u003e\n\u003cli\u003eBalanced CNC billet \/ aircraft-grade aluminium arms provide strength with controlled valvetrain mass.\u003c\/li\u003e\n\u003cli\u003eHardened and ground chromoly roller tips reduce valve-tip and guide wear.\u003c\/li\u003e\n\u003cli\u003eCommon-shaft mounting increases rigidity and clamp footprint.\u003c\/li\u003e\n\u003cli\u003eMaximum spring diameter: 1.437 in.\u003c\/li\u003e\n\u003cli\u003eShim set included.\u003c\/li\u003e\n\u003cli\u003eSuitable for hydraulic and solid camshaft combinations when set up correctly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eEasy-Fit configuration:\u003c\/strong\u003e Uses the factory-size 5\/16-inch bolt-down mounting points and is designed as a direct shaft-system replacement without cylinder-head machining.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Holden 304 \/ 5.0L EFI V8 combinations using VN-style cylinder heads. Confirm the cylinder-head rocker-post machining and mounting-thread configuration before ordering.\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 6309\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":43816979562563,"sku":"YT 6309","price":1295.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0659\/4883\/files\/IMG_8686__29513.1657001348.jpg?v=1789167614","url":"https:\/\/builtbyboostandtune.com.au\/products\/yella-terra-holden-304-5-0-efi-pro-street-1-65-shaft-rockers-yt6309","provider":"BUILT BY BOOST AND TUNE","version":"1.0","type":"link"}