You mean to say you have a '04 FXT longblock. If you plan on using a '04 FXT ecu/harness, you should plan on using ths intake manifold that comes with it. You could even use a '06+ WRX intake manifold or the '08+ plastic. Run top feed injectors with the correct tgv risers. One big reason is the '04 FXT is drive by wire throttle body and you also have AVCS heads.