Ford 2003 Mustang Workshop Manual page 1960

17. Remove the EGR to exhaust manifold tube. For additional information, refer to
18. Disconnect the exhaust valve recirculation (EGR) vacuum line.
19. NOTE: The LH side is shown, the RH is similar.
Remove the four bolts and remove the supply manifold with the fuel injectors attached.
Installation
1. NOTE: The LH side is shown, and the RH is similar.
Install the supply manifold and tighten the four bolts.
2. Connect the EGR vacuum line.
Section 303-08 .