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2021–2025 BMW M3 Exhaust FAQ's

Please read our FAQs page to find out more.

What exhaust changes wake up the G80 without drone?

A quality cat‑back adds tone; pairing with a resonated mid‑pipe controls rasp/drone. For power, high‑flow catted downpipes plus a tune are effective.

Catted vs catless downpipes on the G80—what’s smarter?

High‑flow cats support strong power while controlling odor and rasp. Catless flows more but may be emissions‑noncompliant; check laws and always tune.

Do EU G80s have OPF/GPF to consider?

Many EU cars include OPF/GPF. Ensure your exhaust solution accommodates local regulations; US G80s generally lack OPF/GPF.