PRW BLUMAX® 1.6 ratio, 7/16" Stud Mount Aluminum Rocker Arms.  PRW aluminum rockers are used around the world by professional racers, engine builders and hot rod enthusiasts, offering outstanding power and performance advantages for street, strip, and track applications. Made from high strength 6061-T6 aluminum extrusions, each piece is precision CNC machined and finished by hand to ensure that our customers receive the very best PRW has to offer. PRW stud mount aluminum rockers are specially machined to allow for larger springs and retainers with full-cage friction reducing needle bearings for added durability. The nose rollers and shafts are Cr40 steel, heat-treated and hardened to minimize the wear that naturally occurs between the roller tip and the valve stem. All PRW aluminum rockers come complete with specially designed RockerLocs®, at no additional cost. Designed to meet the demands of most high-lift roller camshaft profiles Specially machined to accommodate larger valve springs and retainers SAE-52100 Full complement precision needle and cage roller bearings Anodized for a superior finish and to reduce operating temperatures CNC machined pushrod cups and heat-treated Cr40 roller tips Internal oiling system for long lasting performance PRW BLUMAX® 1.6 ratio, 7/16" Stud Mount Aluminum Rocker Arms.  PRW aluminum rockers are used around the world by professional racers, engine builders and hot rod enthusiasts, offering outstanding power and performance advantages for street, strip, and track applications. Made from high strength 6061-T6 aluminum extrusions, each piece is precision CNC machined and finished by hand to ensure that our customers receive the very best PRW has to offer. PRW stud mount aluminum rockers are specially machined to allow for larger springs and retainers with full-cage friction reducing needle bearings for added durability. The nose rollers and shafts are Cr40 steel, heat-treated and hardened to minimize the wear that naturally occurs between the roller tip and the valve stem. All PRW aluminum rockers come complete with specially designed RockerLocs®, at no additional cost. Designed to meet the demands of most high-lift roller camshaft profiles Specially machined to accommodate larger valve springs and retainers SAE-52100 Full complement precision needle and cage roller bearings Anodized for a superior finish and to reduce operating temperatures CNC machined pushrod cups and heat-treated Cr40 roller tips Internal oiling system for long lasting performance