Are you running the Power Pack 2 OS from HPTuners then modifying it? I was looking at piecing together my own setup with a GT350 intake and TB. I have an Injen cold air now because I wanted a sealed unit.
My 2011 GT500 had multiple panels repainted the oem Race Red and it all matched perfect. The hood, bumper cover and right rear 1/4. I just got a Cervini hood for my 2015 GT due to knot wanting to deal with aluminum.