What mods do you have?well depends on what kind of tuner you got. Johan at diablosport does tunes but you have to send him a few data logs so he can get it right for you. there are others out there, if there is a performance shop near you , try them out. but you have to have some type of tuning app first, I use a Diablosport trinity, but I am running the one of the canned tunes that come with it, (91 tune) runs better on mine and on the dyno I pulled near 340 RWHP and 375 fpt. so I am not griping that much at all.