BLOX Racing 16-21 Honda Civic SI Sedan 2.5in T304 - Catback Exhaust

This BLOX Racing cat-back exhaust system is made for the 2016-2021 Honda Civic SI Sedan. It replaces the factory exhaust from the catalytic converter back, giving you a more direct path for exhaust gases to exit the vehicle. This can lead to improved engine breathing and a more aggressive exhaust note.

Constructed from T304 stainless steel, this exhaust is built to resist corrosion and hold up well over time, even in harsh conditions. The 2.5-inch diameter piping is chosen to balance exhaust flow with maintaining good low-end torque for the Civic SI's engine. You can expect a deeper, sportier sound compared to the stock system, and potentially a slight improvement in throttle response. The system is designed as a direct bolt-on replacement for the factory exhaust, meaning no welding or cutting is typically required for installation, making it a straightforward upgrade for many DIYers. It includes all the necessary hangers and mounting points to integrate with the factory setup.

When installing this cat-back exhaust, it's a good idea to have a helper, as maneuvering the longer sections can be easier with an extra set of hands. Ensure all connections are tightened properly to prevent leaks and ensure the best sound and performance. This system is designed to work with the factory catalytic converter, so it's a good option if you're looking to enhance your exhaust sound and flow without altering emissions equipment.