you do not need any of these piggy back devices to install a vtec head, a chipped ECU with the right mappings for your head will do much better then a stock non-vtec ECU. however if you would like to further tune the motor after installing both the ECU and head, a piggyback such as a VAFC may do some good. We have a user here with a LS/VTEC putting out just over 200whp that is "tuned" solely on a VAFC. Seems to work well for him. His username is "BigBodySmith"