This is on my '86 TC but it's pretty much the same for any fox bodied Mustang with a transplanted turbo. Could be done on a N/A car also with only minor modifications. The only real expense was the K&N air filter (around $40). I prettied it up with a stainless steel plate too. Parts include: air filter, stainless plate, an extra TC VAM hose, 3" PVC coupler and some scrap metal. CAI's sell for $150+. I say make your own! It was real easy to make. Here's the write-up.
http://www.cardomain.com/ride/530871/54
View attachment 404209
http://www.cardomain.com/ride/530871/54
View attachment 404209