Guide bracket bolt. Left.1999-03. Rear. Right.1999-03. ABS Modulator Bolt. An exhaust Bolt is a specialized fastener designed to secure various components of an exhaust system, including the manifold, catalytic converter, and exhaust pipes. Bolt that secures the bumper cover. Bumper Guide Bolt. Catalytic Converter Bolt. Exhaust Manifold Bolt. Exhaust System Hanger Bolt. Radiator Mount Bolt.