OBX Exhaust Headers 82-90 Chevy Blazer S10 S15 2.8L 2WD Primary Tube : 1.5" OD Collector : 2.5 " OD Flange Thickness : 3/8" Runner Wall Thickness : 16 Gauge (1.5mm) High Performance Track Proven Quality Headers From OBX Racing Sports Direct Bolt On Set Up Without Any Modification Dyno Proven, Increase Low End Torque And Horse Power Great Throttle Response With Great Sound CNC Machined 3/8 inch Thick Flange Dual TIG Weld, High Quality SUS-T304 Stainless Steel For Best Durability Comes With OBX Life Time Warranty OBX Genuine Products Design and Quality of OBX U.S.A. 1982 1983 1984 1985 1986 1987 1988 1989 1990 Chevy Blazer S10 S15 2.8L 2WD