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|Homemade Cold Air Intake for 4.7 Liter Dodge (Dakota, Durango, Full Size)
By Mike Friend (aka LS1 Mopar
My friend has 2001 Dakota with a 4.7 and he was
looking for a little more
power. We had looked around the net and found
some interesting home
brewed ideas for close to 100 bucks not including
shipping. So we
decided we would make our own. It cost about 68
bucks with the K&N
Filter. It sounds good, gets through the RPMS
quicker and he gained 2 mpg on the highway!
So here is what you are going to need:
From your local hardware store (Home Depot,
(1) A 1 1/2 foot section of 3 inch wide Black ABS
(you will trim this later)
(2) 90 degree black ABS Elbows one side of each
should have a spot
for the 3 inch pipe to fit in.
(1) Black 3 inch Toilet Flange
(1) 3 inch to 3 inch rubber coupler smooth
(4) 1 inch by 1/4 inch bolts
(4) 1/4 inch nuts
(1) Can of ABS glue
From your local parts store
(1) K&N Filter E-0995
(1) Breather Filter Napa p/n 2995 it's for a Ford
(1) 5/8 to 3/4 inch heater hose connector Napa
(1) 2 inch piece of 3/4 inch heater hose
(1) 10 mm socket
(1) 1/4 inch Drill bit
(1) Some type of saw
(1) Flat Tipped Screw Driver
(1) Case of beer
Ok so by now you have everything. First thing you
do is remove the Air box and the Silencer
mounted over the intake.
The Silencer will require you to remove two 10mm
bolts and losen the clamp on the throttle
Once you do those two things move over to the air
box. Pull off the PCV line/breather line. There
also one 10mm bolt near the top of the air box
that will need to be removed. Once all three
out and the Silencer is pulled away from the
throttle body, pull up on the airbox, this will
a little pull because there are two rubber
gromets holding it in place on the fender well.
Also remove the "s" shape breather tube
and set it aside, you will need it later.
Okay the Air box is out. That was easy.
Now pick up the 3 inch to 3 inch coupler place
one end over the Throttle body and tighten down.
Next Take one of the 90 Degree Elbow and place
the small side into the other end of the
3 inch to 3 inch coupler.
Now take your toilet flange and your K&N and
hold them together. The Flange will have 4 bolt
in it. Mark those holes on the K&N.
Once the holes are marked drill them all out with
a 1/4 inch drill bit
Connect the other 90 degree elbow to the toliet
flange DON'T GLUE IT YET!
Connect the Filter to flange with the 4 bolts and
At this point you have the Throttle body hooked
up to the 3 inch coupler
and the K&N, Toilet Flange and second 90
degree elbow all hooked up.
Now it is time to get the Black ABS pipe. Hook it
up to the 90 degree elbow already in the truck,
then get the Flange, Filter 90 Degree elbow piece
and see how well it fits in the truck.
Measure how much of the ABS pipe will need to be
Take everything apart now except for the 3 inch
to 3 inch coupler that can stay on the throttle
body. Cut the pipe to size and dry fit everything
again. Once you are happy with how everything
fits mark both of the 90 degree elbows'
placements to the ABS pipe.
Take everything apart again. It is time to glue!
Glue the Toilet flange to one of the 90 degree
eblows, put glue on the flange and on the inside
of the elbow. Don't use a lot. Now hook the two
pieces up - the stuff sets fast so work fairly
Now take the other 90 degree elbow and connect it
to the ABS pipe place glue on inside of the elbow
and on the pipe. Make sure to line up the correct
marks you made for proper placement.
Now Glue the Pipe to the 90 degree elbow and
toilet flange. Again make sure to line up the
placement marks. Attatch K&N filter to Flange
You are almost done now.
Let it set up for a little bit - like 5 mins.
Open a bottle of beer and enjoy.
Then install in the truck. Just hook it back up
to the coupler and tighten down.
The last thing you need to do is put together the
breather tube, you know the "s" shape
one you set aside earlier, and breather element.
The little filter looking thing.
Connect the "s" shaped hose that was
taken out of the truck to the 5/8 to 3/4 inch
heater hose connector. Than take the 2 inch 3/4
inch piece of heater hose and
hook it to the connector and hook up the breather
element to the 3/4 inch heater hose.
Now install that in the truck.
Here is what the finished product should look
You are done!!
We are eventually going to wrap the whole thing
in some type of heat shield.
Well we hope you see the same improvements.
Feel free to email me if you have any questions or
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