{"product_id":"ultra-pro-magnum-rocker-arm-w-1-6-ratio-for-ford-289-351w-w-3-8-stud","title":"Ultra Pro Magnum Rocker Arm W\/ 1.6 Ratio For Ford 289-351W W\/ 3\/8\" Stud","description":"Ultra Pro Magnumâ„¢ Roller Rocker Arms not only live up to the lofty standards of the original Pro Magnums but they also take Stud mount Rocker performance, stability and value to a whole new level. The 8650 chromemoly material and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia and optimizing the dynamic balance. A unique black oxide exterior finish helps prevent corrosion and increases durability. Featuring Oversized trunnions, precision-sorted needle bearings and hardened Roller tips for the ultimate in performance and dependability. Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050\" locks without clearance or fitment issues.\u0026lt;ul\u0026gt;\u0026lt;li\u0026gt;Ford V8 289-302-351W - 3\/8\" Stud - 1.6 Ratio\u0026lt;\/li\u0026gt;\u0026lt;li\u0026gt;Investment cast 8650 chromemoly body and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia. Unique black oxide exterior finish helps prevent corrosion and increases durability.\u0026lt;\/li\u0026gt;\u0026lt;li\u0026gt;Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050\" locks without clearance or fitment issues.\u0026lt;\/li\u0026gt;\u0026lt;li\u0026gt;Feature Oversized trunnions, precision-sorted needle bearings and hardened Roller tips.\u0026lt;\/li\u0026gt;\u0026lt;li\u0026gt;Lifetime Warranty - So strong that we guarantee the Rocker bodies against breakage for life. For use with up to 850 lbs of open spring pressure.\u0026lt;\/li\u0026gt;\u0026lt;\/ul\u0026gt;\r\n\u003ch3\u003eAttributes:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eBrand Name: \u003c\/b\u003eCOMP Cams\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGTIN: \u003c\/b\u003e00036584196105\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAmazon ASIN: \u003c\/b\u003eB0046ZG9QY\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. E.O. Number: \u003c\/b\u003eN\/A\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?: \u003c\/b\u003eYes, but must meet tailpipe emission standards for year of vehicle.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?: \u003c\/b\u003eYes, but must meet tailpipe emission standards for year of vehicle.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: \u003c\/b\u003eYes, but must meet tailpipe emission standards for year of vehicle.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exempt for On-Road Vehicles?: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: \u003c\/b\u003eYes, but must be a race\/competition only vehicle.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exemption Reason: \u003c\/b\u003eN\/A\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eEngine Family: \u003c\/b\u003eFord 289-351W\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eMaximum Valve Spring Open Pressure: \u003c\/b\u003e850\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRocker Arm Material: \u003c\/b\u003e8650 Chromemoly Steel\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRocker Arm Ratio: \u003c\/b\u003e1.6\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRocker Arm Series: \u003c\/b\u003eUltra Pro Magnum\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRocker Stud Diameter: \u003c\/b\u003e3\/8\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003eExtended Information:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eCountry of Origin: \u003c\/b\u003eUS\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eEmissions : \u003c\/b\u003eCARB Eligible\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003ePacking Information:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eQuantity of Each: \u003c\/b\u003e1\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003ePackage UOM: \u003c\/b\u003eEA\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eDimension: \u003c\/b\u003e5.7 x 3.2 x 1.7 inches\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWeight: \u003c\/b\u003e0.6 POUNDS\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cdiv id=\"sema-product-fitment\" class=\"product__accordion accordion fitment\"\u003e\u003c\/div\u003e","brand":"COMP Cams","offers":[{"title":"Default Title","offer_id":44707250110509,"sku":"BDQQ-1631-1","price":91.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/2780\/2157\/files\/1631-1.jpg?v=1773361416","url":"https:\/\/montgomeryparts.com\/products\/ultra-pro-magnum-rocker-arm-w-1-6-ratio-for-ford-289-351w-w-3-8-stud","provider":"Montgomery Parts","version":"1.0","type":"link"}