Hey guys, I have 2008 v36 370gt. Everytime the car is turned on and is idling I hear a rattling sound. Took it a mechanic and was told the cats are nearly done - got a quote from Nissan for $2000 per cat lol. For a second opinion took it to Autobahn here in Perth, and I was advised that they can "regenerate" cats and it would stop rattling. I've booked the appointment for Regen early next year. I personally think I'll have no luck with the regen so now I am starting to look for a plan b. Would it advisable to change the whole exhaust system and this would take care of the rattling sound? If yes, what would be a nice exhaust system that is not too obnoxious (as I use my car as my everyday) but can roar on higher revs when needed [emoji23] Also, folks from Western Australia, any recommendations for a good shop I could go to? Thanks in advance.