The LX is not a vtec. is is the sohc 105 HP motor the same thats in the DX. The EX is the SOHC vtec which has 127 HP. As for them all showing VTEC they dont. My 99 civic EX has the D16y8 which is the SOHC VTEC and it didnt say VTEC on it. That was befor I swaped it to a B16 DOHC VTEC. As for the years, The 1992-1995 is one body style, and the 1996-2000 is another.