I'm running the FMF mega bomb and FMF Q4 muffler & very happy with the power results (I originally had a 2bro slip-on & the noise was unacceptable around town & my neighbors hated me). I don't think you will gain any power from changing a full 2bros system....maybe a tiny tiny bit more low/mid torque form the mega bomb header but IMO not worth changing unless you need quieter sound levels because the police have warned you to....lol !!KLX331 Crazy;279449 wrote: Hi Guys, is anyone out there running the FMF mega bomb and FMF muffler?? I would like to hear what you think of them?? I am currently running a full 2bros carbon exhaust but have read a bit on the mega bomb and the advantages that may be gained, before i fork out the $$ Iwould like to hear it straight from the camels mouth so to speak.