Designed specifically for the Mazda L3 DISI Engine: \n 31mm OD. 3.50mm shim. 25mm skirt. \n  \n Kelford Cams DLC Coated Buckets Feature: \n larger internal fillet and reinforced skirt. \n Increased rigidity increases both camshaft and bucket longevity. \n DLC coated follower surface decrease friction \n Decreases surface wear and oil temps \n Improves torque required to turn the camshaft. \n  \n \n Available in 2.78mm,3.0mm,3.50mm,3.78mm, 5.25mm, 6.15mm and 6.40mm 'shim' thickness options \n  \n Disclaimer: Installation by a qualified tradesperson is strongly recommended. These cam followers are not a drop in solution. \n \n Note: There is a fixed internal length for each part number. Setting valve clearance (Lash) is required by adjusting valve tip heights, seat cut depth and camshaft base circle size. \n \n