What cold air to use with Pro-M 80mm shorty

AFM probably makes the best but it will cost you. UPR makes a cheaper one and then there is always the Ebay ones. They are all probably going to perform close to each other. I have the UPR one.
Kevin
 
I use an aluminum c&l tube with mine and it goes into an accufab 75mm tb.

If money was no object i'd do a 4" Anderson powerpipe and an accufab 75mm race TB (90mm opening)