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