CXRacing Racing Performance Header 2 Pcs Set 85-87 Toyota Corolla AE86 16V 20V Connects to Factory Exhaust System 2nd Pipe Welded with Facotry O2 Bung Flange Exhaust Flange Are Specially Designed to Fit Both 16V and 20V Blocks. 4-2-1 Runner with Stainless Steel with CNC Mandrel-Bent Tubing 1.65" Runner Tube, 2.5" Main Tube to Exhaust