Stainless Works Ford Mustang 2005-10 Headers - Manual

05-10 MUSTANG GT HEADER INSTALLATION INSTRUCTIONS
To remove stock manifolds:
1. Exhaust installation is best performed on a lift by a qualified technician. Before
starting any work, make sure that vehicle is adequately supported before starting,
and raised as high as possible to ease removal of the manifolds & installation of
the headers.
2. Disconnect battery, and remove air box for easy access to dipstick and tube. It
will be easier to remove the right front O2 sensor if the battery and battery box are
removed.
3. Leave the left front O2 sensor in the manifold, and disconnect the wiring harness
to it and to the (2) lower O2 sensors.
4. Remove the factory exhaust system starting at the rear of car. It may be necessary
to have the exhaust system at full droop to aid in removal and reinstallation.
5. Remove the bolt holding the steering shaft to rack, and remove the left mounting
bolt holding the rack to the frame. Before moving the rack, mark the location of
the rack on both the rack and frame, so that the rack can be re-installed in the
exact position it was removed.
6. Loosen right bolt holding rack to frame but do not remove.
7. Pull left side of rack forward and pop steering shaft off. Push steering shaft over
to driver’s side of car so that it is out of the way when removing the manifolds.
Lay the steering shaft on top of the frame rail. Be sure to lower the shaft before
the header is in place.
8. Remove left and right motor mount nuts.
9. Remove nuts holding manifold to head.
10. Jack motor up (make certain NOT to be under the car when doing this and make
sure that vehicle is adequately supported!), so that motor mount stud will drop
down through aluminum bracket off motor to get enough clearance to remove
passenger side manifold from bottom of car.
11. Remove all studs from both heads to allow additional clearance for the installation
of the headers. It may be easier to remove the driver’s side manifold through the
top when all the studs are removed.