Thread: 4" FWI Write Up
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Old 09-22-2007, 03:33 AM
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4" FWI Write Up

Materials Needed-

4" to 3" Coupler (For Stock Throttle Body Only)
4" 90 degree Flexible Elbow
4" Thin Wall PVC Pipe (Atleast 15 inches long)
3" to 4" Thermoplastic Roof Flashing
7" Air Cone with 4" inlet




Step 1-

The first thing that needs to be done is the front bumper needs to be removed completely from the car. Instructions on how to do that can be found here-

http://www.clubgp.com/newforum/tm.as...de=&s=#3296961


Once you have the front bumper removed you'll see that the fender bracket is in the way. You will have to cut parts of this off so that your air cone will fit. Make sure you mark what needs to be cut well and only cut small sections at a time becuase only a portion needs to be removed. Not the entire thing.



Step 2-

Now in order to make your custom FWI intake you will need to get your thin wall PVC pipe and cut a 11 1/2 inch section and a 3 inch section out.
Click the image to open in full size.
Click the image to open in full size.



Step 3-

Now, cut your 90 degree elbow into two identical halves
Click the image to open in full size.

You'll only need one half of this elbow so the other half can be tossed aside.



Step 4-

Using the 3" long piece of PVC pipe you cut out earlier connect the 4" to 3" coupler to the 90 elbow and clamp both sides down. It will be a very tight fit to get the PVC pipe inside of the elbow, but it will fit.



Step 5-

Now, with your roof flashing...
Click the image to open in full size.

Cut it down to these dimensions...
Click the image to open in full size.

If it does'nt fit exactly right thats fine, just trim it up if need be untill it fits the way you want it to.



Step 6-

With your 3" PVC pipe connecting your coupler and your elbow together mark off the location for your IAT sensor and find a drill bit just slightly smaller than the IAT itself and drill a hole into the side of the coupler so that the IAT fits snug into it.
Click the image to open in full size.

Now go ahead and push the intake pipe through the roof flashing and clamp the air cone down onto one side of the intake pipe aswell.

With that being done go ahead and connect the other end of your intake pipe into your 90 degree elbow and clamp it down so that now you should have a complete intake.



Step 7-

Postion the air cone into the fender well through the inside of your engine bay and postion the intake the way it needs to be.

Slide the coupler onto your throttle body and then slide the roof flashing down the intake pipe untill it's snug up agianst the inner fender and connect your IAT sensor back up.






Once you've got it all complete you should have an intake identical to this.[]

Click the image to open in full size.
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Last edited by Street_Wolf1049; 09-22-2007 at 03:49 AM.
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