OER Parts offers a selection of OE Style Manifolds for your 1968 Pontiac LeMans. OER Parts offers 1968 Pontiac LeMans Exhaust Manifolds without Smog Tube Holes, 1968 Pontiac LeMans Exhaust Manifolds with Smog Tube Holes, 1968 Pontiac LeMans Hemi Exhaust Manifolds, 1968 Pontiac LeMans Ram Horn Exhaust Manifold, 1968 Pontiac LeMans Ram Air I Exhaust Manifolds, 1968 Pontiac LeMans Ram Air II Exhaust Manifolds, 1968 Pontiac LeMans Ram Air III Exhaust Manifolds, and 1968 Pontiac LeMans Ram Air I Longbranch Exhaust Manifold.