here's the deal..everytime you see "catback" for our car, it's not true
our cars cannot have a catback without having to weld and no one makes a true catback for our car, nonetheless, it would just be eliminating that second resonator.
kazuma replaces the cat, so you have a straight back design...no cats, no resonators, always best gainTRD
sport is the best gains along with TPR and TSRM right now
I think RS-R is up there too, but i have never seen dynos of it...
TPR performs better than TRD
, RS-R, TSRM
and also performs just as good as the kazuma without being illegal since it's an axle back.