I'm trying to find a dual exhaust system kit, but all I've been able to find was a dynomax exaust with 2.25 in. diameter pipes, I'd like to run 2.5 inch flowmaster. The dynomax exaust my be all right, but I didn't see anyone that had headers with a 2.25 in. diameter flange, nor was a able to find 2.25 inch flowmaster mufflers. could I buy a custom exaust for a suburban or pickup of the same year, and make it work without much hassle?