JUN camshafts are manufactured from new castings to maximize life and duration. The camshafts are designed and tested by the JUN engineers. Through tesing in racing and hi-street use lift and duration profiles are obtained. For optimum performance and to prevent valve float, we recommend to use the JUN valve spring kit with the use of their camshafts. For B-series DOHC VTEC engines Type 1, 2, and 3 are available. For the H-series DOHC VTEC engine, there is only one design available.