My 2011 GT 6-Speed has a Roush CAI, Roush catback exhaust, and a SCT/Bama tune (93 octane). I was think of installing a Ford Racing 85mm Throttlebody. Based on what the current state of tune is, is the TB upgrade worh it? From my research, it seems the TB upgrade works best when turbo or supercharging. Am I wasting $500? 