OER Parts offers a wide selection of Manifold Hardware for your 1971 Chevrolet K20 Pickup. OER Parts offers 1971 Chevrolet K20 Pickup Bolts, 1971 Chevrolet K20 Pickup Exhaust Flanges, 1971 Chevrolet K20 Pickup Extension Pipes, 1971 Chevrolet K20 Pickup Header & Exhaust Manifold Paint, 1971 Chevrolet K20 Pickup Header & Exhaust Manifold Wraps & Blankets, and 1971 Chevrolet K20 Pickup Heat Risers.