Stainless Works Ford F-150 2004-08 5.4L Headers - Manual (Page 2)

12. Remove (2) 8mm bolts holding front hanger bracket to X-member.
13. Remove (2) 6 mm bolts that hold right and left heat shields to X-member.
14. Support transmission and transfer case, remove (2) 12mm nuts from transmission
mount.
15. Remove (4) 12 mm bolts and nuts and cross member
16. Unplug (4) 02 sensors.
17. Loosen clamp and remove (4) 10 mm nuts for Y-pipe and remove Y-pipe.
18. Re-install cross-member and transmission mount at this time.
19. Remove (1) 8mm nut and (1) 6mm nut and remove starter wires.
20. Remove (1) 8mm nut and (3) 8 mm bolts and starter.
21. Remove (1) 6mm bolt holding dipstick tube and remove dipstick.
22. Remove (2) 6 mm bolts holding right heat shield and slide it back.
23. Remove (16) 8mm nuts and studs (8 per side), holding manifolds in and remove
manifolds.
INSTALLATION OF HEADERS AND LEAD PIPES
24. Install front O2 extensions (109014) to O2 wires on truck.
25. Apply RTV sealant to headers, wait 15 minutes and install from bottom.
26. Install catalytic converters or off road pipes using (2) 3” clamps.
27. Slide factory rubber hanger insulator on left lead pipe and install using a 2.5
clamp then re-fasten hanger to X-member.