i have a terrible memory so ill try to go with the basics so i dont provide poor information. exhaust flow can have an impact on the power curve so if op went dual exhaust as shown it can lower the power one spot but increase the power elsewhere. i cant remember the specifics but it definitely wouldn't be the first time i was asked why someones car feels like it got slower off the line after a diy custom exhaust. usually when someone went too big on pipe diameter for a dual exhaust system for an engine that doesn't have the velocity to do it. op doesn't look like they went overkill and kept with the original pipe size coming off the front so it wouldn't be the case here. so
@Javie was probably just asking for reference purposes im assuming. im no exhaust guru so i generally just have an exhaust shop do a system for me or i buy a kit so i know it works with the vehicle fit and function.