Downpipe for Scion tC for turbo use. Use with ATP Scion turbo manifold with internally wastegated T25 flanged versions of the GT28RS, GT2871R, GT3071RWG, GT3076RWG Turbos. High flowing 2.5" diameter mandrel bent stainless tubing. O2 bung for stock O2 sensor. TIG welded construction. Easy bolt-on use with Garrett GT ball bearing turbos with built-in internal wastegates.