OBX Exhaust Header 84 85 86 87 88 89 90 91 92 Mazda RX-7 RX7 1.3L 13B Non-Turbo Dual TIG Weld, High Quality SUS-T304 Stainless Steel For Best Durability Backed by OBX Limited Lifetime warranty from manufacturer defects OBX Genuine Products Design and Quality of OBX U.S.A High Performance Track Proven Quality Headers From OBX Racing Sports Precision CNC Machined 3/8 inch Thick Flange