I am trying to order a tube to extend the throttle body into the fender for a cold air intake. I want to do it online so I can have it here on Wednesday. Does anyone know the diameter of the outside or what size hose I need so I can go ahead and order this now while I'm at work? I Googled and Googled and Googled I tried zzp site I tried AutoZone and a few other websites and just cannot find the diameter. I would have thought I could have found it somewhere!

4" is what you'll need.

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03 Buick Regal. 13.0x @103
87 Fiero GT. L67, XP, Ported heads, SD headers, 3.2. 12.6@108 1.8 60'.

I originally used one of these for mine. Its kind of a temporary solution.

I'm going to upgrade to one of these and some 4 inch couplers. You just cut out the part(s) you need.

I ended up going to ZZP's site to get their intake tubing. I have a N* Tb though but it's roughly the same outer size. It looks like zzp's tubing is out of stock though.

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03 Buick Regal. 13.0x @103
87 Fiero GT. L67, XP, Ported heads, SD headers, 3.2. 12.6@108 1.8 60'.

Thanks everyone! I just ordered one from Amazon that will be here on Wednesday. I ordered the one that domtec said he uses a temporary solution, cuz I'm not sure what I'm going to end up with in the long run for running down in the fender so that is a good temporary one