I have a RES cat back system. It is great, lots of pops and burbles in Sports+ mode, otherwise it’s quite tame in comfort mode. It also comes with a remote control to control the valves. However I’ve left them open and on comfort mode it’s pretty restrained.

Only catch is that the OBD port stays connected with the receiver for the remote to control the valves.

Monoprice cables are great. Keep them to a max of 10ft