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1992–2002 Mazda RX-7 Exhaust FAQ's

Please read our FAQs page to find out more.

How do I get a deeper tone without drone on the FD?

A resonated turbo‑back with proper muffler volume controls rasp and drone. Heat shielding near ABS/lines protects components in the tight FD bay.

Catted vs catless downpipe on a rotary—pros and cons?

High‑flow cats tame odor/rasp and improve boost response; catless flows more but may be emissions‑illegal. Always tune and monitor EGT/AFR after changes.

Do twinscroll or single‑exit systems help spool on single‑turbo FDs?

Well‑designed bellmouth/downpipe and minimal transitions reduce backpressure and improve response; match the turbine A/R to power goals and track use.