Tomei Poncam Camshaft Set, Type R, To Suit The Nissan Skyline 200SX S14 & S15 (SR20DET). The Tomei Poncam camshafts are designed as a drop in replacement. No dialling in required as the knock-pin has been pre-set so that the cam timing it set for you. No valve spring upgrades are required and is the cheapest and best upgade for street and track use. | Available Specifications | | Duration (In) | Duration (Ex) | Lift (In) | Lift (Ex) | | 256° | 256° | 11.50mm | 11.50mm | |