Looks similar to my DynoJet pull on pump gas. I have the stock NPP muffler/suitcase though. Borla ATAK is nice as I have that on my Jeep. Just could not justify the $$ for the gain for that mod.
(Torque curve is slightly different) Max power peaked ~5500 rpms, and torque peaked at ~ 4500 rpms on mine.
I would roll with it and enjoy

My next mods will kick me over 650 hopefully