Showing specs for all NA & NB Miatas

Valve guide installed projection (NA8)

Height: 0.721—0.744 in (18.3—18.9 mm)Height: 18.3—18.9mm {0.721—0.744 in}

Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Dimension A is installed guide projection from the head reference surface along the guide axis. Verify after installation. Factory installer depth L uses the same range; use correct SST. Source states exhaust guide may replace intake guide despite original differences.

Applies to
  • NA 1994–1997 (BP) — Other years inferred from 1994 factory evidence.
  • Verified in: 1994 Mazda MX-5 Miata Workshop Manual