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2004–2012 Mazda RX-8 Exhaust FAQ's

Please read our FAQs page to find out more.

How do I add sound without drone on an RX‑8?

A resonated cat‑back with proper muffler volume deepens tone while controlling rasp. Rotaries benefit from larger packing volume and quality materials.

High‑flow cat vs catless on a rotary—what’s smarter?

High‑flow cats reduce backpressure while controlling odor and rasp; catless flows more but may be emissions‑illegal. Always check laws and tune accordingly.

Do headers help on the Renesis?

A well‑designed header and mid‑pipe can free top‑end and sharpen response when paired with intake and tuning.