I know I'm a really late bloomer on doing my mouthpiece but for those of you who haven't done it yet... YOU NEED TO!!! I have a Banks 6 gun, Banks RamAir, egr blocked, MBRP DownPipe, 4" DiamondEye straight exhaust, PCV reroute and after the AFE mouthpiece install today, my truck literally CAME ALIVE! I didn't realize how all those mods were pretty useless until I did the mouthpiece. Wethere you go with the lbz, kodiak or AFE, it will make a world of difference! It took me about 15-20 minutes.