{"product_id":"yellaterra-pro-street-roller-rockers-1-65-ratio-5-16-mount-twin-shaft-adjustable-suit-holden-253-308-pair","title":"Yella Terra YellaTerra Pro Street Roller Rockers 1.65 Ratio (5\/16\" Mount, Twin Shaft Adjustable) - YT5033-2","description":"\u003cp\u003eHOLD.V8 1.63 BOLTON ADJ.SHAFT\u003c\/p\u003e\u003cp\u003eSuit Holden 253-308 (Pair)\u003c\/p\u003e\u003cp\u003e\u003cb\u003ePart Number\u003c\/b\u003e: YT5033-2\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cdiv class=\"value description\" itemprop=\"description\"\u003e \u003cp\u003ePro Street\u003c\/p\u003e\n\u003cp\u003eDesigned for high revving street\/strip applications. No other comparable product can compete with 600lbs* maximum open spring pressure whilst retaining factory size bolt-down hardware. \u003c\/p\u003e\n\u003cp\u003eManufactured and assembled in Australia using the highest quality materials and componentry consistent with those found in our Platinum race series.\u003c\/p\u003e\n\u003cp\u003eOur wide range of true ratios allows you to achieve high lift without relying solely on your camshaft… a trend many engine builders and racers alike are adopting to relieve the inertia on lifters and pushrods generated by aggressive and often violent ramp rates required to make big lift. \u003c\/p\u003e\n\u003cp\u003eIdeal for harsh street and strip applications, especially in place of the factory stamped steel GMH rockers that have seen decades of wear and tear. These rockers have got what it takes to last!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Choose Pro Street?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBuilt to withstand 600lbs* max open spring pressure\u003c\/li\u003e\n\u003cli\u003eOversize full-complement caged bearings designed for oscillating (rocking) loads, paired with oversize precision ground trunnions to reduce friction.\u003c\/li\u003e\n\u003cli\u003eIntricately balanced CNC billet arms ensuring vital valvetrain stability - focusing attention on the harmony of the entire engine.\u003c\/li\u003e\n\u003cli\u003eExtruded from aircraft grade aluminium, perfect for dissipating excess top-end heat.\u003c\/li\u003e\n\u003cli\u003eProven bolt-on shaft mount design that mounts both inlet\/exhaust to common shaft, effectively increasing footprint and clamp load twofold without any further cylinder head modification.\u003c\/li\u003e\n\u003cli\u003eVarious ratios available, catering for every camshaft grind. High ratios allow for additional lift on stock and aftermarket camshafts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eChrome moly steel hardened and ground roller tips of generous diameter (positively retained by internal circlip) preventing abrasion of valve tips and guides commonly seen with non-roller tip rockers. Allows for smoother, quieter operation. Maintains lash and reduces necessary and tedious engine maintenance.\u003c\/p\u003e\n\u003cp\u003eEasy Fit Shaft - Adjustable - Suitable for both HYDRAULIC and SOLID camshafts\u003c\/p\u003e\n\u003cp\u003eThe original \"bolt on\" rocker. Simply remove old rocker gear and replace with the shaft assembly that bolt onto the original mounting holes with no modification. Tremendous rigidity\u003c\/p\u003e\n\u003cp\u003eWhen installing adjustable rockers, double cork gaskets or taller rocker covers may be required. Please check clearance exists between Lash adjuster \u0026amp; Rocker covers at maximum lift. \u003cbr\u003e\u003c\/p\u003e \u003c\/div\u003e\u003cp\u003e\u003cb\u003eSpecifications\u003c\/b\u003e: \u003c\/p\u003e\u003cdiv class=\"content-body\"\u003e\n\u003cp\u003ePART NO: YT 5033\u003cbr\u003eMAKE: HOLDEN\u003cbr\u003eMODEL: All early style Pre-EFI heads to 1988\u003cbr\u003eSERIES: PRO STREET\u003cbr\u003eENGINE: 253 4.2L| 308 5.0L V8\u003cbr\u003eYEAR: 1969-1988\u003cbr\u003ePART TYPE: ROLLER ROCKERS\u003cbr\u003eMOUNTING STYLE: SHAFT TYPE\u003cbr\u003eROCKER ARM RATIO: 1.65\u003cbr\u003eSTUD SIZE: 5\/16\" \u003cbr\u003eADJUSTABLE: ADJUSTABLE\u003cbr\u003eHYDRAULIC: -\u003cbr\u003eROCKER ARM STYLE: FULL ROLLER\u003cbr\u003eSHIMS INCLUDED: \u003cbr\u003eROCKER MATERIAL: ALUMINIUM\u003cbr\u003eSELF-ALIGNING: NO\u003cbr\u003eROCKER ARM BODY STYLE: STANDARD\u003cbr\u003eROCKER ARM NUT STYLE: CAPSCREW\u003cbr\u003eMAX SPRING DIAMETER: 1.437\"\u003cbr\u003eMAX OPEN SPRING PRESSURE: 600lbs\u003cbr\u003eINLET OFFSET: -\u003cbr\u003eQTY: PAIR\u003cbr\u003eBRAND: PRO STREET\u003cbr\u003eNOTE: Easy Fit bolt-on. No machining required. May require double cork askets or Aftermarket taller covers for clearance.\u003c\/p\u003e \u003c\/div\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Yella Terra","offers":[{"title":"Default Title","offer_id":49003806654691,"sku":"YT5033-2","price":361.9,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/0821\/9875\/files\/vei0gdo53qmohavcr2sc.jpg?v=1779542230","url":"https:\/\/fastlanespares.co.nz\/products\/yellaterra-pro-street-roller-rockers-1-65-ratio-5-16-mount-twin-shaft-adjustable-suit-holden-253-308-pair","provider":"Fast Lane Spares","version":"1.0","type":"link"}