Exhaust is one month old. 3” Stainless steel with optional flex coupling for an after market downpipe. This exhaust was special ordered from Stromung (through boxer4racing) and uses a quieter muffler than the normal Stromung exhaust. I had it installed in and I found it still to be to loud for my taste. I went to Tim’s custom exhaust and had an in-line 3” magnaflow in-line muffler added to the midpipe. Still to loud for my taste, so I’m going a different route. I have all recipes, with over $900 invested in it so far. $675 I’ll get some pictures up soon.