This is my 2009 Infiniti G37x Sedan that was completely OEM (besides cosmetic upgrades). After this video, my car now has the Stillen Stainless Steel Cat-Back Exhaust system on it, part #504377. The job took just under an hour.
Overall, the 'hum' that the car makes now and the feeling you get pretty much whenever in the vehicle is much more fulfilling than the original exhaust.

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