Supertech High Performance Engine Valves, Springs, Valve Accessories, Pistons and Block Guards Cam Follower for BMW / 37,5mm x 28mm x 3,1mm Supertech Cam Follower CF-37.5/3.1+DLC DLC coated Note: These are not to be used with lash caps, these are to be use with Supertech 8mm shims! Solid tappet 37,5mm x 28mm x 3,1mm (for 8mm shims) / DLC beschichtet Fits: BMW S14 The Cam Follower were designed using the newest CAD software and finite element method (FEM) to gain victory in the most demanding applications like long distance racing, street racing or drag racing. They can not be compared to low-priced or stock Cam Followers because they are made from higher quality materials and coating and a high level production process which is usually just available in professional formula 1 level. The used material is an airspace certified chrome-molybdenum-vanadium alloy. This alloy is a much stronger material than serial production Cam Follower are made of.