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2024–2026 Ford Mustang Exhaust FAQ's

Please read our FAQs page to find out more.

How do I add sound without drone on the S650?

A quality cat‑back with proper muffler volume and a resonated section deepens tone while controlling rasp/drone for daily use. Active‑valve systems retain quiet modes.

Catted vs catless headers—what’s smarter?

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

Do I need a tune after installing headers or a downpipe (EcoBoost)?

Yes—post‑exhaust changes affect fueling, trims, and boost control. A calibration restores targets and protects the engine under load.