No emissions testing required here. I can get a DT ceramic coated header for $254 + S&H, I can get the Hedman for $169.95, or the Calmini for $259.95. The muffler is an Insynerator with welding, pipe and hangers $250. Been tols it is like a flowmaster but it is aluminum and wont rust with a lifetime warranty. I have been reading all the posts and it is a toss up. My concern is the O2 sensor and the location on the different headers.