Well I was interested in these after I read an article on them. They suppose to be worth some power compared to the rest of shorties out there. Well I went to the Brothers sale, and asked about their tuned length shorties. He told me they wont be release until October. Kind of sucks because I was really interested in these. I guess I will just wait for them and the rest of the aftermarket to hurry up and produce some parts for our late model 4.6s.