i have been driving an hf for a while now since i blew up my other rex so since i have a dx motor laying in garage and a si tranny now might as well drop it in with an si intake mani. i have the ecu. So the question is do i need to change anthing elso to make it work never seen to many people swap for a dx motor.

i will be replacing the hf for si tranny, hf ecu to si ecu, hf engine to dx engine, keeping mpfi, changing to dx hubs. someone told me i had to change the map sensor. also i am going to have extra vaccum lines so which can i get rid of?

 

bump also can i run the hf dizzy or do need the si

 

Plenty of threads in the FAQ