We've been running Two Brothers Racing Comp-S 2-into-1 exhaust system and Comp-V High-Flow intake for about 6 months now. This combo looks and sounds great but in order to get the most out of this set up, we needed to add a tuner to get this all running as it should. We recently installed Dynojet's Power Commander V and after getting the correct mapping in place, immediately noticed a difference overall performance. No more idle popping, throttle response is always where it needs to be in both low end and top end speeds and a few more pony's to boot always puts a smile on our face.