You’re getting a durable and visually appealing stainless steel exhaust manifold for the attractive price typically seen with cast iron options. These cast twin scroll manifolds will spool your turbo faster and more efficiently. The T3 flange with additional bolt holes for T4 turbos offer great compatibility. They’re compact, yet easily fit larger turbos (like the Holset HE351 seen fitted in the photos, and the HX35 in the last photo, installed in a W210).
 
There are two conveniently located buses on the underside at each end that can be tapped for sensors (such as EGT and/or EGP). The wastegate port fits common units, like a Tial 44, Turbosmart 45 and Precision 46. We like these.