Stainless Works Chevy/GMC Truck 2007+ Headers - Manual (Page 2)

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8. Remove Manifolds as follows:
9. From the top, remove right and left spark plugs and wires, remove manifold bolts
and manifolds.
10. Remove (4) bolts 12mm in sway bar and let it hang down.
11. Remove factory exhaust per the Stainless Works Exhaust installation instructions.
HEADER INSTALLATION
12. DO NOT reuse factory manifold gaskets, instead use red RTV hi temperature
silicone sealant.
13. Install left (drivers) header from the top by pulling the large engine harness
toward the front of the vehicle and slowly lower header into position. Install and
tighten bolts and reinstall plugs and wires.
14. Install right (passenger) header from underneath vehicle. It may be necessary to
push transmission lines toward engine to get header flange into position. Install
and tighten bolts, reinstall plugs, wires, drive shaft and sway bar. Remove front
O2’s from “Y” pipe and install in the headers.
15. Place a 2-½” clamp on both right and left collectors and install both catalytic
converters. The cat with the bend welded to it goes on the left (drivers) header.
Install straight pipe with O2 bung on right (passenger) header, rotate the left
converter so the bend faces downward and slip left rear lead pipe (cross over) on
along with 2-½” clamp, rotate back into position (end of left rear lead pipe approx
½ inch above cross member) and snug clamps on both lead pipes.
16. Slide a 2-1/2” clamp on the ends of both driver and passenger lead pipes and
install. Level rear of pipe with passenger lead pipe and clamp. Note that the
driver side lead pipe will extend over to the right side of the passenger lead pipe.
Install rear O2’s at this time and reconnect to factory harness. Below is a picture
taken from the front of the truck showing the driver side lead pipe extending
along the crossbar to the passenger side of the truck.