As I promised, I have fabbed up a few sets of the vents like what I made for my car. They are lightweight aluminum with painted steel stiffeners. See the photo for details. 1 set includes 2 vents, 2 stiffeners and 24 aluminum rivets.
When I tested these I saw a 25 to 30% increase in flow through the intercoolers on a 72 deg. day at 65mph. If you have a converted NA you must provide some way to remove the air that enters the intercoolers. If you have installed larger than stock IC's on a factory TT, you need some way to move more air across them to get the full benefit.
These will help you get the most out of whatever configuration you have.
Price per set $ 50.00. ($55.00 for black) I accept Paypal, checks or money orders and do not charge a fee for using Paypal. The vents packed for shipping weigh 1lb 12oz and will be shipped from zip code 45359 if you want to calculate shipping. Priority Mail is $7.50 to California.
I will be happy to provide them in Epoxy gloss black for an additional $5.00 per set.
Follow Ups
Intercooler Vents - Help your IC's breathe - kkrofft (OH)13:25:24 10/16/07
Intercooler Vents - Help your IC's breathe - 
