In a message dated 02-01-15 23:37:04 EST, you write: << his is not doable. If you need variable capacity, your only choice is a Nissan muffler. Go into a Meineke and ask the guy behind the counter about his selection of VC accoustic dampers. Take a picture, I want to see the look on his face, too. :) >> Does nissan manufacture stainless steel mufflers as stock?