GReddy 2017+ Honda Civic SI Sedan DD-R Resonated Exhaust

If you're looking to give your 2017+ Honda Civic SI Sedan a more aggressive exhaust note and improved flow, this GReddy DD-R Resonated Cat-Back Exhaust is a solid choice. This system replaces the factory exhaust from the catalytic converter back, aiming to enhance both the sound and performance of your vehicle's powertrain. It's designed to bolt directly onto the existing factory connection point, simplifying the installation process for a cleaner, more powerful exhaust experience.

The DD-R (Dual-Drive Resonator) system features a unique internal design that balances a deep, sporty tone with a comfortable level of cabin noise. GReddy constructs this exhaust from durable, polished stainless steel, which not only looks good under your car but also offers excellent resistance to corrosion and heat. The larger diameter piping and free-flowing muffler design help reduce backpressure, allowing your engine to breathe more freely. This can lead to a more responsive throttle and a noticeable increase in power, especially when combined with other engine modifications.

This cat-back system includes all the necessary components for installation, such as hangers and clamps, ensuring a complete package right out of the box. While it's designed as a direct fit, it's always a good idea to refer to the manufacturer's installation instructions for specific details and any recommended tools. The result is a well-built exhaust system that not only sounds great but also contributes to the overall performance of your Civic SI.