Which exhaust should I get?

FPenvy

no, there is 3 options of resonators that you can choose from. also remember the real drone comes in when you delete the cats.

FI OPTIONS:
high flow cats w/ resonators - least power gain & least volume/drone
HFC/no res - low drone decent power
test pipes w/ res - good power slight drone reduction
non-res test pipes - most power/most noise
long tube headers -

CBE:
18" resonators - least drone, slightly less ext volume
12" resonators - small drone
no resonators -

on a sidenote pretty much any aftermarket exhaust there is going to be some drone at some RPM its kinda how sound waves work and if you want to add some power/volume you cant be a little bitch about a bit of in cabin noise. its a sports car, its how it should sound.

i have the non-res CBE w/ CF mufflers and non-res TPs. also i have my set of FI straight pipes.

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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler