INFINITI QX4 Replacement Exhaust Systems

Our exhaust systems are direct-fit replacements engineered to match the original equipment specifications for your specific year, make, model, and engine. No cutting, bending, or welding is required. The multi-piece bolt-on design is built to install around the same obstacles the factory exhaust navigates, including axles, crossbars, and brackets. Always confirm fitment using the vehicle selector before purchasing.

Everything needed to complete the installation is packaged together in a single protective box. Pipes, muffler(s), hangers, gaskets, clamps, bolts, and nuts. You won't need to source hardware separately. The specific components vary by kit; refer to the hardware kit section on the product page for the exact count of each item included with your part number.

No. Our direct-fit exhaust kits replace only the piping and muffler components downstream of the catalytic converter. All emissions equipment including your catalytic converter and oxygen sensors remains in place and untouched. This means your vehicle stays emissions-compliant and your check engine light won't be triggered by the installation itself.

Our pipes are precision mandrel bent, which maintains consistent interior diameter through every curve preserving exhaust flow. Many competing aftermarket systems use crush bending, which collapses the pipe wall at bends and creates flow restriction. Combined with corrosion-resistant aluminized steel construction, our systems are built for long-term durability in real-world driving conditions.

Our aluminized exhaust systems are covered by a 2-year construction warranty with no mileage cap. Our stainless steel exhaust systems are covered by a Limited lifetime, unlimited mileage warranty. This covers defects in materials and workmanship under normal use conditions. See our warranty policy page for full terms, or contact our Customer Success team directly if you have questions about a specific claim.