OER Parts offers a wide selection of Manifold Hardware for your 1968 Chevrolet All Models. OER Parts offers 1968 Chevrolet All Models Bolts, 1968 Chevrolet All Models Exhaust Flanges, 1968 Chevrolet All Models Extension Pipes, 1968 Chevrolet All Models Header & Exhaust Manifold Paint, 1968 Chevrolet All Models Header & Exhaust Manifold Wraps & Blankets, and 1968 Chevrolet All Models Heat Risers.