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