ChevyTuscany

I have a 2007 Chevy 1500HD crew cab classic body style and I am looking to replace my stock exhaust with a catback exhaust kit. I found online someone that has used a flowmaster (part number 17350) exhaust kit on their 2007 GMC 1500HD crew cab classic body style. According to Flowmaster both online and talking to them on the phone, they don't make a kit for that year of truck. According to their web site that kit fits up to 2003 on GMC. My exhaust is dual 2 3/4" in and single 2 3/4" out of the muffler. I was just wondering if anyone out there has any experience with this kit or my year and body style of truck