The problem with the TTIs is that if you need bigger then the 1-5/8 to 1-3/4 stepped header your out of luck. They have a 1-7/8" tube but they are for W2 heads.
Thus the problem. The 414 stroker going in the Duster has well over 500 hp and very, very, massaged Eddy magnum heads. I could probably bring myself to pay the price for the tti's since they certainly wouldn't be the first thing I've bought that I didn't think was worth the money, but in this case, they simply don't have the product that I feel I need to get the most out of the stroker. Choices definitely appear limited.