SPD's 304 stainless high performance resonator cat-back pipe replaces your factory resonator pipe wi.. SPD's high performance stage 2 resonator cat-back pipe replaces your factory resonator pipe with a t.. We have redesigned our GX Series catback systems and will have them available to ship at the end of .. The exhaust system is one of the most important parts of any vehicle. It protects the driver and other nearby cars almost as much as the braking system does. If you want your car to take care of you, you need to take the best care of it.

Considering cat-back exhausts replace more restrictions, they typically offer increased performance and noise compared to axle-back systems