oops i've been taking the dual stage VTEC terms all worng. no there is no dual stage VTEC engagment, there is the dual stage manifold which is what i thought yall were talking about. its not possbile for VTEC to engage after it has alredy engaged. there is the dual stage manifold which may be confising everyone. no such thing as a dual VTEC engagment on the B18C1.