GReddy Supreme SP Cat Back Exhaust for Mazda RX-8 (`03-`08) is a 63.5mm dual-muffler cat-back system designed to replace the rear section of the factory exhaust and deliver a more engaging tone and improved flow characteristics. It is built for the 2003–2008 RX-8 platform and retains the cat-back configuration for straightforward integration.

This GReddy Supreme SP exhaust uses 63.5mm piping and a dual-muffler layout to provide a balanced sound profile that suits drivers who want a sportier note without being overly aggressive. As a cat-back system, it replaces rear piping and mufflers while keeping the original catalytic converter location. The design focuses on reliable fitment for the RX-8 and provides a clear upgrade path for enthusiasts seeking better exhaust flow and a refined exhaust note for street or weekend use.

Features

• 63.5mm exhaust piping diameter
• Dual muffler Supreme SP configuration for balanced tone
• Cat-back fitment for 2003–2008 Mazda RX-8
• GReddy Supreme SP model specifically for RX-8 applications

If you have questions or want help confirming fitment, call us directly — Austin, TX: 512-982-9393, Los Angeles/CA: 562-981-6800. We have locations in Austin, Texas and the Los Angeles, California area where we offer installation and customization services. If you are considering purchasing multiple items, please contact us about shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov