RB26DETT Shim-less DLC Coated Cam Follower x 24 | 6.15mm KCF-182S31mm OD. 6. 15mm shim. 25mm skirt 31. 42mm base circle Nissan RB26DETT Shim Less DLC Coated Cam Follower. KCF 182S have a 6. 15mm shim thickness for the 182 S and 182 SE camshafts. Kelford Cams DLC Coated Buckets Feature: larger internal fillet and reinforced skirt. Increased rigidity increases both camshaft and bucket longevity. DLC coated follower surface decrease friction Decreases surface wear and oil temps Improves torque required to turn the