I GOTTA 99 CIVIC HX I ALSO HAVE THE ECU TO THE CIVIC SI (P2T) I WANTED SOME ADVISE ON HOW TO GET IT INTO THE HX. I'VE SEEN IT DONE I JUST WANTED TO KNOW HOW TO GET IT DONE...THANKS

 

the si is double over head cam.. the hx is single.. there is no reason why u would swap ecu's.. i would get a jumper and run a p-28.. witch is a 92-95 si single cam euc,, it will run a lot better and stronger, plus if u swap u can use the same ecu i have it with a mugen cheap running my ls vtec turbo in my 99 ex...