I Have a 1991 Civic EF Dx Model.. With a Dualpoint d15 non Vtec.. im planning to get a new Head from a 96+ civic Ex Or any Vtec head i can find that will Fit my Buget.. im just wondering is it Hard To Wire my car to Vtec.. Because of The Dual Point, this meaning do i have to rewire the injetors...etc and put in a ex manifold?... i Found a obd-o to obd-1 jumper online and was wondering if this would do t he job? or do i have to put in new wiring?.. im pretty new.. please dont flame me.. i need help..

 

try the faq section. here's one thread that might help https://honda-tech.com/zerothread?id=554053