{"product_id":"cca-rocker-arm-kits-68","title":"COMP Cams 1620-12 - Ultra Pro Magnum Rocker Arm Set of 12 w\/ 1.7 Ratio Chevrolet 396-454 7\/16\" Stud","description":"\u003cp\u003eUltra 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 redu cing 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; Chevy V8 396-454 c.i.d. - 7\/16\" Stud - 1.7 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;\u003c\/p\u003e","brand":"COMP Cams","offers":[{"title":"Default Title","offer_id":45357277839495,"sku":"COM1620-12","price":631.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0744\/4008\/1543\/files\/1620-12.jpg?v=1788268449","url":"https:\/\/checkout.northernperformance.ca\/products\/cca-rocker-arm-kits-68","provider":"Northern Performance","version":"1.0","type":"link"}