Car is currently at 105K miles with stock 370z y-pipe and Invidia N1 exhaust. Just cleaned out MAF and air intake Cone cos I thought it would help with the rough idling (it didn’t). Car idles roughly, I can smell fuel when I get out of my car being parked, and definitely noticed loss of power esp from a stop. I’m suspecting bad cats. Anyone had a similar experience? Just trying to get some input before buying some HFC.