I have real Terry Houston 3.5 downpipe special ordered bare with no integral wastegate/flange. I was going to have a TIAL 44mm external gate added to this along with the passenger header but decided to get out of the buick game. It is stainless, one piece mandrel bent not welded together ugly sections, proper fit for the TR g body, it also comes with a tangentile v band stainless flange and clamp as well. Someone will need to finish this pipe as the flange is not tigged on yet. $600.00 firm plus s&h and paypal fees.