1.5 3/8 Stainless Steel Roller Rocker Arms Sbc 305 350 400 For Small Block Chevy. For Small Block Chevy Stainless Steel Roller Rockers 1.50 Ratio, 3/8 Stud Maximum Race Series Stainless Steel Rockers Made from high strength 15-5PH stainless steel, each piece is precision CNC machined and finished by hand to ensure that our customers receive the very best KMJ has to offer. ARC stud mount steel 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 ARC stainless steel rockers come complete with poly locks 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 CNC machined pushrod cups and heat-treated Cr40 roller tips Internal oiling system for long lasting performance Clears most centerbolt covers (depending on the inside of the cover). Applications: For CHEVROLET Small Block Gen I 262 (1975-76), 265 (1955-57), 267 (1979-82), 283 (1957-67), 302 (1967-68), 305 (1976-86), 307 (1968-73), 327 (1962-69), 350 (1967-86), 400 (1970-80). International Buyers please Note: a. These charges are the buyers responsibility. We are committed to achieving 5 star ratings. We will try our best to resolve any kind of issue.