Hi-Performance Heat Treated Steel Push Rods For Air-cooled Vw Engines. Resists Flexing At High RPM's Under The Loads Of High Lift Cams And Heavy Valve Spring Pressures. A Must With Any Dual Spring Application. Made From The Highest Quality Heat Treated 5/16" Steel Tubing, Ends Are Pre-installed And Push Rods Are 11.078" Overall Length. Fits 1300cc-1600cc Engines. Specs: Length 11.078" Stock Diameter 5/16" Material Heat Treated Steel Set Of 8 Empi 4033