Having installed both Dougs and tti's in mine, the Dougs are an easier install because they are a multi piece header. I have a 904 trans however. The coating on the dougs is polished and looks better than the flat aluminum paint looking coating on the tti's. The advantage on the tti's is they have 1-5/8 to 1-3/4 stepped tubes into a 3" collector, the Dougs are 1-5/8 tubes to a 2-1/2 collector. For a 360 the Dougs work great, but with a 408 I like the tti's better.
