Black Coated Performance Exhaust Header System For 1996-2001 Chevy S10 & S15 4.3L V6, 2WD Model Only Fits: 1996-2001 Chevy S10 & S15 4.3L V6, 2WD Model Only 16-Gauge Mild Steel & Black Coated For Durability Tube Diameter: 1.50". Collector Diameter: 2.50" Flanged Connection. Replaces Factory Exhaust Manifolds & Retain OEM/Factory Catalytic Converter TIG Weld & Mandrel-Bent For Maximum Performance