← Mazda Miata NB (1999-2005 US model years)
Will Mazdaspeed Miata BP5A intake camshaft fit a Mazda Miata NB (1999-2005 US model years)?
Short answer: Yes, reportedly. Reported
Yes, reportedly: The Mazdaspeed's more aggressive BP5A intake cam is described as a direct-fit upgrade for a 1999-2000 engine.
| Part | Mazdaspeed Miata BP5A intake camshaft |
|---|---|
| Vehicle | Mazda Miata NB (1999-2005 US model years) |
| Years | 1999-2000 |
| Trim / condition | NB1 non-VVT engines only; does NOT fit 2001-05 VVT |
| Verdict | Reported to fit |
| 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
The Mazdaspeed's more aggressive BP5A intake cam is described as a direct-fit upgrade for a 1999-2000 engine. It does not fit the 2001-05 VVT engine. Single dealer source; check cam timing setup with a shop manual.
Other engine fitment for the NB
- NB2 (2001-05) VVT 1.8L engine — Fits with extra parts or work
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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