When running an external wg, are the majority of the dump tubes custom made? Reason being is that I cant find anyone who sells just the dump tube. Im have very little knowledge of external wastegates and are trying to learn more about them as far as the parts that make them function. Im am looking mainly for the correct setup for running a external wg such as a tial on a stock SR manfiold.

Im assuming that all you would need to to cut and weld a flange on the 1+4 runner for the wg run the apporiate lines for vacumn and boost controller/source(?) and have some type of dump tube either running back into the system or dumping into the atmosphere(what Im trying to accomplish). All links/helps/etc would be apprecaited.