I have K&N air filter with heat shield air box, D&D exhaust, EBR ecm, and Dobeck TFI as well! I have to tell you I absolutely love it. I started with just the K&N, D&D, and Dobeck hell that alone gave me a new bike once I found a EBR ecm for $100 never used from a track enthusiast that is trustworthy I put that on as well. New bike again! I wonder what would happen if I put 2 race ecms on it, well I will leave that for the GSXR's!