I took my 2011 GT500 to Chris and his team at Scottsdale Muffler on 4/6/16. I had installed a full 3" Kooks exhaust on my car and I just couldn't get it to fit right. His guys took all of maybe 20 min and a few weld tacks and it's tight and perfect. Tough to find a good shop in this town and I'll be back for sure. Thanks guys.