Maximizer Stainless Exhaust Header Manifold S10 Sonoma 4.3L 2WD Exhaust Header Manifold Fit For 1996-2001 S10 Sonoma 4.3L 2WD Maximizer High Performent Stainless Steel Exhaust Header Manifold Header Flange Thickness: 3/8"/Primary Tubes Diameter OD: 1 1/2" /Collector Diameter OD: 2 1/2"/ Collector Flange Thickness: 3/8" 96-01 S10 Sonoma 4.3L 2WD