You will be hard pressed to find anyone with a prochamber on our cars at this point. They are a new release item and there are much, much cheaper options. I had a prochamber on my 03 GT and it sounded amazing. But on these cars, I'd suspect that it may not have a favorable tone. But, exhaust is extreme subjective so, give it a shot and find out. I will say that it'll likely have a more pleasing tone with a chambered muffler.
2014 Camaro 6.2 SS/RS M6 - JLT 110MM CAI, Hurst STS, TSP 2" LTH w/ O/R Pipes, NPP Exhaust, SCT X4 w/ MPT 93 Tune
2012 Mustang 3.7 Base M6 - SOLD - AirAid CAI, Ported Intakes from Lone Wolf, BBK Shorty Headers, Lethal Off-Road H, Magnaflow Competition Axle Back, MPT 93 Race Tune, 3.73's, DSS Aluminum Driveshaft, SR Performance Shifter, FRPP Strut Tower Brace, Eibach Pro System Plus Kit, BMR LCA's, BMR Adjustable Panhard Bar, 18x9/10 SVE Drift Wheels, 255/285 Nitto's