Installation will vary from vehicle to
vehicle due to differences in tolerances. These instructions detail my
experience with a '93 Explorer.
Step 1. Remove the negative battery
cable. This will prevent any shorts from occurring and will also reset
your computer so it can "re-learn" the engines new air fuel requirements.
Step 2. Remove the factory airbox
assembly. Loosen the clamp holding the intake pipe to the throttle body.
Unplug the connector from the MAF and remove the rubber hose running between
the oil fill neck and the intake pipe. Disconnect the two vacuum lines
from the top of the air box. Remove the two screws holding the air box
lid in place. Now you can remove the whole top half of the assembly by
pulling and twisting the intake pipe connection at the throttle body.
Step 3. Unbolt the airbox lid from
the MAF taking care not to damage the MAF. (This would also be a good time
to clean the MAF sensor as described in my Tech
Tip page). Remove the bottom half of the air box by removing the
single bolt and pulling the box free from it's rubber grommets. (KKM recommends
that you remove the heat riser assembly and the stock intake tube. I left
mine in place in case there is a problem with emissions requirements during
an inspection. Leaving it in place does not interfere with the operation
or installation of the True-Rev-Kit.)
Step 4. Bolt the True-Rev adapter
plate and the support brackets to the MAF. The brackets are attached to
the lower half of the MAF. Leave the bolts holding the brackets slightly
loose for now. Make sure the longer bolts pass through the support brackets.
Step 5. Reinstall the intake pipe
assembly to the throttle body leaving the clamp loose. Line up the brackets
on the MAF with the existing airbox base plate in such a way that the air
filter is unobstructed and so that the intake pipe is not interfering with
any engine parts such as the alternator pulley. When you find a suitable
location mark and drill holes through the base plate. In my specific installation
I needed to supply a 1-1/2" x 1/4-20 bolt. This bolt passed through the
base plate and the inner fender well.
Step 6. Recheck for clearance around
the entire installation. If everything looks good, tighten the MAF bracket
bolts, the intake pipe clamp and reinstall the MAF connector.
Step 7. Install the supplied aluminum
plug in the vacuum line that was attached to the stock airbox. This is
the line that runs to the manifold. The other line can be left open or
removed depending if you decided to keep your stock heat riser in place
Step 7. Reinstall your battery cable.
Go out and enjoy your new found power and
throaty sound from the high performance intake system.