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2016–2025 Mazda MX-5 Miata Exhaust FAQ's

Please read our FAQs page to find out more.

What exhaust setup works for a daily ND without drone?

A resonated header‑back with appropriate muffler volume deepens tone while remaining civil. 2.25–2.5" tubing suits most NA builds; FI may prefer larger.

Are high‑flow cats a good compromise for power and compliance?

Quality high‑flow cats reduce backpressure while controlling odor and rasp. Check local laws and pair with proper fueling and a calibration.

Do I need a tune after header/cat changes on the ND?

A calibration optimizes fueling, timing, and torque limits—especially valuable on ND2—unlocking gains from intake/header/exhaust combos.