I have a 15 Z51 M7. The car has a Halltech carbon cai, ARH mids with high flow cats, Borla catless x-pipe, B & B bullets, Katech light weight flywheel and a DSS carbon driveshaft, among some other mods. It dyno's at 465 hp at the wheels. Not much more then yours but with a lot more mods. I found the MDS intake made a 20 hp difference. The mods made the car about a 100 lbs. lighter, which equates to maybe 10 phantom hp.
I'm sure your car sounds a lot more muscular. Enjoy.