i need to know which harness to use. im thinkin bout just chopping up them both and using my ex harness. but then would i have to take the wires at the kick panel. cut them and then connect them to lines up with the integ ecu plugs?

 

use the EX harness. very little modifying.

 

ok. but if i use the EX harness. i have to change almost all the plugs right? cuz the ones from the b18 are different sizes on alot of them. and i still need to kno if i take like 4 inches of wire and the plug from the teg. and make a jumper harness thing for the teg ecu.

 

correct. just change the plugs.