True dual exhaust vs xyz single into muffler exhaust !
 

So I'm trying to figure out the difference and which makes more power and torque ! I'm sure it's already been answered somewhere but just looking for opinions as I'm looking at exhaust at the moment ! I know I'll be using HFC or cat deletes still not sure lots of questions considering that part to like will running cat deletes not throw a code with check engine light. Not trying to light my dash up like a X-Mas tree ! :driving: