So, If heat is a plus with turbos, that may eplain why they still work on these kits. All the Kits are for late model cars and trucks. What's on a late model car and truck? Answer; Catalytic Converters!!!! Lots of heat!!!! and close to were the turbos mount up too! Try it on an old car such as the ones we build. OOPS all the heat is gone that far back. Answer may be, put a cat on you're old car and wrap the pipe between the cat and the turbo to retain the heat. It might be the only case of actually increasing power by installing a Catalytic converter!!! Seems like a lot of work too me. Mark Price