4
7) Remove both manifolds from the bottom of the vehicle.
8) While the passenger side is still jacked up, install the new headers along with the factory
gaskets from under the vehicle. Snug the nuts down but do not tighten fully at this time.
9) Lower the engine back down until satisfied with the engine alignment. Then, install the
main bolt, heat shield and the two bolts attaching the mount to the engine. Torque all bolts
to factory specs.
10) Next, install the driver side header using the factory gasket. Snug the nuts down but do
not tighten fully at this time.
11) Now reinstall the catalytic converter pipes with the factory crush (O-ring) gasket in place.
Attach the assembly to the header using one supplied M10-1.25x35mm bolt and M10-
1.25 nut along with the two factory nuts. Leave the connection loose at this time.
12) Once you are satisfied with the alignment of all the components, you may begin tightening
everything down starting at the header first. Tighten down the header nuts starting in the
middle working your way outward.
13) Then tighten the connections at the catalytic converter pipes.
14) Reconnect both of the O2 sensor harnesses and reinstall both O2 sensors.
15) Check the header for proper clearance from any hoses or lines and that all connections
along the exhaust system are tighten down properly. Wipe excess oil, grease and
fingerprints off the headers with acetone or equivlant.
16) Reconnect the battery. Start the engine and check for leaks.
17) Re-torque all hardware after approximately 20 minutes of operation.
THY-470
NISSAN/ SUZUKI 4.0L
FRONTIER, PATHFINDER, XTERRA/
EQUATOR, 2005-12, 2/4WD
