The original Ultra-Gold Aluminum Rockers changed the way racing and high performance street engine builders approached valve train design. Now, COMP Cams is revolutionizing valve train performance again with the next generation of Ultra-Gold ARC Series Aluminum Rocker Arms, featuring an Arced, Recessed, Contoured design. Using cutting-edge design techniques and manufacturing processes, Ultra-Gold ARC Rockers increase engine power, enhance valve train stability and improve oiling. Ultra-Gold ARC Rockers feature a new extrusion based on improvements developed through FEA analysis, resulting in an even stronger, stiffer body without compromising mass. A new arced channel and contoured top, similar to a bridge design, give the rockers the best strength-to-weight ratio possible. The body has additional CNC contouring to improve clearances for valve covers and springs. Manufactured entirely in the U.S.A., all Ultra-Gold ARC Series Aluminum Rocker Arms feature a spring oiler channel through the body for improved lubrication. Trunnion retaining clips have been replaced with an ultra durable spiral lock type clip, similar to what holds a piston pin in place. Stress relieving radii have also been added to areas of the body, trunnion and pushrod seat insert. Even the included locking nuts (not used in LS applications) have been revised to increase surface area to better maintain lash and eliminate wear. * Increase engine power, enhance valve train stability and improve oiling * CNC-machined, lightweight design removes weight and yields unrivaled quality and ratio accuracy * Arced channel & contoured top give the rockers the best strength to weight ratio possible * Precision-sorted trunnion bearings withstand valve spring pressure up to 700 lbs. * Designed for high performance street and race engines PartNumber : cca19052-16 Description : Ultra-Gold Aluminum Rocker Arm; 16 Pieces Title : 19052-16 Alum Ped MT Rockr Arms, Ford S B 1.6"5/16 Ratio : 1.5 Stud Diameter : 3/8" California Proposition 65 : WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Engine Family : Ford 302-351W (1977-1992) Maximum Valve Spring Open Pressure : 700 Rocker Arm Material : Aluminum Rocker Arm Ratio : 1.6 Rocker Arm Series : Ultra-Gold ARC Aluminum Rocker Stud Diameter : 5/16 Pedestal Mount 1979-1980 Ford E-350 Econoline Club Wagon Base V8.-cc Engine Components::Rocker Arms 1979-1980 Ford E-350 Econoline Club Wagon Chateau V8.-cc Engine Components::Rocker Arms 1979-1980 Ford E-350 Econoline Club Wagon Custom V8.-cc Engine Components::Rocker Arms 1977-1979 Ford LTD II Base V8.-cc Engine Components::Rocker Arms 1977-1978 Ford LTD II Brougham V8.-cc Engine Components::Rocker Arms 1979 Ford LTD II Landau V8.-cc Engine Components::Rocker Arms 1977-1979 Ford LTD II S V8.-cc Engine Components::Rocker Arms 1977 Ford LTD II Squire V8.-cc Engine Components::Rocker Arms 1977 Ford Maverick Base V8.-cc Engine Components::Rocker Arms 1977 Ford Maverick Grabber V8.-cc Engine Components::Rocker Arms