Stainless Steal Header Manifold for Chevrolet Blazer (1997-2001) 4.3L EngineThe 4. 3L Vortec is legendary for its torque and durabilityit's essentially a Small Block Chevy minus two cylinders. But even the best engines are suffocated by factory cost cutting. If your Blazer is suffering from the tell tale ticking of a cracked exhaust manifold or feels sluggish off the line, the restrictive stock cast iron logs are likely the culprit. Stainless Steel Exhaust Header Manifold for 1997 2001 Chevrolet Blazer (4. 3L Vortec 4WD) For