Dual Tubing Collector: 2.50" OD 16 Gauge Exhaust Inlets with 2.40" ID. Stainless T6 Divided Turbo Inlet Flange Twin Scroll Divorced 1/2" S400 Threaded. T6 Inlet Port Shape: Divided Twin Scroll Ports. Stainless T6 Divided Turbo Inlet Flange to 3.0" ID V-band Twin Scroll Ports USA.