They will inspect to see if you have cats, even if you pass without them. So at a minimum it has to look like you have them. I have high flow cats groom Kooks and a cam. No clue if it will pass.
I will put the stock exhaust back on for the test if I fail with the current setup.
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GXP, 223/230 .634/.609 114+3, BTR .660 springs, BTR 7.425 rods, IWIS Pro Chain, Comp Rocker Trunions, VCM OTR CAI, Kooks 1 7/8 LTs, HF Cats, X pipe, Solo Axelbacks or Hooker Maxflows, Billet PCV catch can, CTS-V rear calipers. Updated GM trans mount, Camaro trans pan, HSRK w/ Omega 44005 Thermistor, BMR Rear Cradle bushings, BRM Trailing Arms, Pat G tune.
20% 3M CS tint, Kicker 8's, Rockford Fosgage T1D210 in sealed box, 1,000,000 uF Cap, Kicker 1000W amp, tons of Dynamat