Table of Contents
Replacing the OEM exhaust system on a Honda Civic Si can improve your vehicle’s performance and sound. This guide provides step-by-step instructions to help you safely and effectively replace your exhaust system at home or in your garage.
Tools and Materials Needed
- Socket set and ratchet
- WD-40 or penetrating oil
- Exhaust hanger removal tool
- New exhaust system or parts
- Jack and jack stands
- Safety glasses and gloves
- Torque wrench
Preparation
Park your Honda Civic Si on a flat surface and engage the parking brake. Use the jack to lift the vehicle and secure it with jack stands. Wear safety glasses and gloves to protect yourself during the process. Spray penetrating oil on the bolts and clamps of the existing exhaust to loosen rust and corrosion.
Removing the Old Exhaust System
Start by removing the clamps and bolts connecting the exhaust system to the catalytic converter and muffler. Use the exhaust hanger removal tool to detach the exhaust from the rubber hangers. Carefully lower and remove the old exhaust system from underneath the vehicle.
Installing the New Exhaust System
Position the new exhaust system under the vehicle, aligning it with the catalytic converter and muffler connections. Attach the exhaust to the rubber hangers first to hold it in place. Then, secure the clamps and bolts, tightening them to the manufacturer’s specified torque using a torque wrench.
Final Checks and Test Drive
Lower the vehicle and remove the jack stands. Start your engine and listen for any leaks or unusual sounds. Check all connections to ensure they are secure. Take a short test drive to confirm the new exhaust system operates smoothly and enhances your Civic Si’s performance.