Jeep Cherokee XJ 4.0 - Exhaust Comparison (Stock vs. Glasspack) (GoPro Stereo)

I took a video right after I bought my XJ when it still had the stock exhaust, I replaced all of it with a Glasspack muffler and took another!
The difference is huge!

UPDATE: I recently upgraded the injectors (1 out of the 6 was different than the others!) and it runs a little better. I replaced the started because it failed and now it starts almost instantly but there's still a little hiccup... I think it could be the fuel pump or the fuel rail pressure regulator... Still don't know for sure... Or it could be the dirty intake?

Recorded with dual external microphones.

Видео Jeep Cherokee XJ 4.0 - Exhaust Comparison (Stock vs. Glasspack) (GoPro Stereo) канала Cyriac's Jeeps