First thing would be to rethink the exhaust coming out in front of the passenger side rear wheel.
Speaking from experience, this will discolor the passenger side wheel over time, just a heads up.
Those are all Cat Converters, no "resonators".
The Ranger exhaust system is tuned to create a lower pressure at the exhaust valves in the mid-range RPM band, this gives a bit more power to rear wheels since crank doesn't use as much power at that time to push out exhaust, it is sucked out by the lower pressure.
Headers are designed/tuned for this as well, they come in low-band, mid-band and high-band RPM ranges, they don't "add" power, just move when the power is available in the RPM range.
"Free Flow" exhaust will reduce power because you will lose the lower pressure, this is where the back pressure myth comes from.
Best to keep exhaust system from heads to Y-pipe as is, that's the tuned part, then use equal or larger pipe from there to the tail pipe, where ever you decide that to be.
A working cat converter can't reduce performance, it isn't possible, a blocked Cat can of course reduce performance by creating back pressure.