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Tomei Poncam camshafts are designed as a "drop in application", No dialing in required as the nock-pin has been pre-set so that the timing is set for you. Tomei Poncams are designed to work with the standard valve springs and offer the best drop in performance gain for both street and track use. These cams will work with the OEM ECU settings and aftermarket ECU if you want more customized settings.