What does a configuration like this cost to have installed (including parts & labor)?
Depends on your installer. The guy I used is a perfectionist so he didn't cut any corners. My set-up was about 6 bills. All stainless steel piping used from the mufflers to the rear axle and the cat deletes. He even re created the stock baffle plate with rectangle outlets into the oem tips in the bumper. The mufflers are painted black for a factory appearance. Now the car has the sound a R-spec should have without being too loud.