Running a procharger, same exhaust, no issues. I've been on the dyno 3 or 4 times since I installed the exhaust, but prior to those sessions the car ran fine.
Running headers / high flow cats on this car? If not your exhaust change would not fluctuate back pressure or A/F enough to cause stalling. The exhaust flows better, but it is not a free pass to the atmosphere. You still have mufflers, and if no headers, still have the cats and midpipe. Problem is lying elsewhere.
Check your maf sensor, be sure it's clean. Could be a coincidence that after the exhaust a routine maintenance item surfaced - especially with the blower on the car.