Damper bolt. FROM VIN EA134601. Left.3.0 LITER GAS. Right.3.0 LITER GAS. An Exhaust Bolt is a specialized fastener designed to secure various components of an Exhaust system, including the manifold, catalytic converter, and Exhaust Pipes. Exhaust System Hanger Bolt. System Hanger. Center. Damper. Resonator AND. Included with: Converter & Pipe.