ITS turbo has a very good rep with the mustang guys. I have been following them for awhile now. Carson is very active in turbomustangs.com. They are are about the only ones on the market that produce a TT kit for the mustang. They also did at one time Guarantee month delivery date on kits that were already fabbed up. As far as offering cheaper prices I think there using a diffrent type of steel for the headers instead of stainless. I have seen other turbo companys do this also. newcougar.org has a big thread on the subject. Do a search on a user called nay nay. I think he is just trying to push the product but doesn't know much about the inner workings.