← Mazda Miata NB (1999-2005 US model years)
Will NB2 (2001-05) tubular exhaust manifold with EGR tube fit a Mazda Miata NB (1999-2005 US model years)?
Short answer: Yes, with extra parts or work. Reported
Yes, with extra parts or work: Described as a popular NB1 upgrade.
| Part | NB2 (2001-05) tubular exhaust manifold with EGR tube |
|---|---|
| Vehicle | Mazda Miata NB (1999-2005 US model years) |
| Years | 1999-2000 |
| Trim / condition | NB1; California-emissions cars need more parts |
| Verdict | Fits with extra parts or work |
| Confidence | 2 of 3 — Stated by one reasonably reputable source (retailer, shop, magazine). Not independently confirmed. |
| Last verified | 2026-10-20 (date the cited sources were last read) |
Details
Described as a popular NB1 upgrade. Federal cars need the manifold plus the NB2 EGR tube (heat shields optional). California-emissions cars also need extended O2 sensor wiring and an extra sensor bung after the mid-pipe converter. Single dealer source.
Sources
- NB Miata Compatibility Guide (NB2 to NB1) — Redline Auto Parts (used-parts dealer; hands-on checks, own disclaimer; Dec 2018) (vendor article; read 2026-10-20; full page read)
Summaries are in our own words. Fitment is not guaranteed — disclaimer.
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