I've got a Tuning Developments TD04 Ex Wastegate manifold which is made of cheese, and continues to crack despite several re-welds and braces added. I've had enough of it, and want to swap it out for something better made. Is it likely I can just get one from WEPR or Zisco etc, and swap it like for like, or will I need to get a whole new downpipe too? Cheers for any help Al