Two of my biggest regrets were buying Cobb's turbo heat shield and GrimmSpeed's turbo heat shield. Although they both looked really good, they didn't perform nearly as well as a modified stock heat shield would have. I ended up recycling my stock heat shield because it had some surface rust and the Cobb heat shield because I scratched it pretty bad at my local scrap yard for a few cents and I sold my GrimmSpeed heat shield. I currently have a Prosport turbo blanket and I'm pretty happy with that.
07 WRX (Albins 5MT + Blouch 20G)
Jorge Carrillo Tuned (365 whp/340 wtq)