← Mazda Miata NB (1999-2005 US model years)
Will NB2 "Sport" brake package (2001-02 LS/SE, all 2003-05) 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: A used-parts dealer says the Sport package fits an NB1 if you move over the calipers, larger caliper brackets, rotors, pads and front brake lines, and trim the dust shields; factory 14-inch wheels and some 15-inch wheels will not clear.
| Part | NB2 "Sport" brake package (2001-02 LS/SE, all 2003-05) |
|---|---|
| Vehicle | Mazda Miata NB (1999-2005 US model years) |
| Years | 1999-2000 |
| Trim / condition | NB1 (1999-2000); 2001-02 base cars already have the smaller brakes |
| 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
A used-parts dealer says the Sport package fits an NB1 if you move over the calipers, larger caliper brackets, rotors, pads and front brake lines, and trim the dust shields; factory 14-inch wheels and some 15-inch wheels will not clear. A forum owner who did the swap adds that the Sport calipers take more fluid, so expect a longer pedal unless the master cylinder (and with it the booster) is changed too. Not manufacturer verified.
Specs
- front rotor in: 10.6
- rear rotor in: 10.9
- note: sizes from Mazda's 2005 Mazdaspeed spec sheet, which uses the same size
Related build entries
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)
- NB1 to NB2 sport brake conversion — MX-5 Miata Forum (forum thread; read 2026-10-20; search excerpt only)
- 2005 MAZDASPEED MX-5 Miata specifications — Mazda North American Operations (press spec sheet) (mfr spec; read 2026-10-20; search excerpt only)Used only for the 10.6-inch front / 10.9-inch rear rotor sizes.
Summaries are in our own words. Fitment is not guaranteed — disclaimer.
Report a correction — spotted an error or have a better source? Email hello@chassisdex.com.