I purchased some C.park (Powertrix) fog light ducts a little over a year ago. They are non CF and Nixit APPORVED! I painted them black.
 I then cut a hole in my IC ducts using a 2" door drill bit.
before:
after:
 The next part was finding the right tubing. I looked every where for a strong, durable tubing (Lowes, Home Depot (Spee did not help me out at all.) & etc) After a long search I went to Baker Racing and bought brake tubing for my ducts. I was pretty impressed with them.
But the price killed me. 
I had to remove the fog light brackets to install the fog light ducts and silicon/zipped tied them to the front bumper. Do I think it's a good mod to do? Yes. I later took the Z to the track and clicked off my best time. Boost was more stable and I noticed as it got colder my traps began to rise more noticeably then with out the ducts. before:
 after:
 Great product Charles!!
Link to his product.
[ http://www.twinturbo.net/net/viewmsg.aspx?forum=classified&msg_id=91706 ] P.S. Please mod with a purpose? :-)
www.SoCalZCrew.com
**Dynoed at 371.2 rwhp. and 362.3 rwtrq. @ .9 bar on pumped 91 gas no time tweaking 3/11/03**
**Dynoed at 411 rwhp. and 452 rwtq. @1.15 kg. on race gas 104 no time tweaking 3/28/03 **All numbers are SAE corrected**
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Something I did back in spring. - 
