The 2 Into 1 Collector with 2" inlets and 2 1/2" outlet, made of mild steel by 7th Phase Inc., is a high-performance auto part designed for racing applications. Manufactured in the United States, this collector is known for its efficiency in combining two exhaust streams into one outlet. 2" inlets (2) 2 1/2" outlet (1) 8 1/2" long weld on We have a big variety of collectors. Need something else? Message us.