I just installed 12'' resonator cf CBE + HFC. To my ears, drone is definitely there when revving. It's pretty silent at cruising speed though. Mine's a DD and I don't mind it, I think my ears just got to used to the stock note which is way too quiet. But if drone is your concern, you might wanna go with 18'' resonators.
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2013 PW 370Z Touring+Sport, NAV
Tint 35% side, 18% back | RJM clutch pedal | ZSpeed SS lines | Stillen Gen3 CAI | Fast Intentions HFC and TDX 12'' CF CBE | UpRev
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