# Valve overall length (Mazdaspeed)

Canonical URL: https://miatatorque.com/spec/valve-length-msm/

Applicability: NB 2004–2005 (BP-Z3-TURBO) — 2004 factory turbo-engine evidence; 2005 inferred within MSM family.

Confidence: fsm

Standard length
IN: 101.71—102.31 mm {4.0044—4.0279 in}
EX: 101.71—102.31 mm {4.0044—4.0279 in}
Minimum length
IN: 101.61 mm {4.0004 in}
EX: 101.61 mm {4.0004 in}

Always confirm against your factory manual. Match every restriction and follow all stages and procedure notes. Disputed claims must not be automatically resolved. The complete record below preserves every printed unit, source claim and procedure.

```json
{
  "id": "valve-length-msm",
  "name": "Valve overall length (Mazdaspeed)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NB",
      "years": [
        2004,
        2005
      ],
      "engines": [
        "BP-Z3-TURBO"
      ],
      "note": "2004 factory turbo-engine evidence; 2005 inferred within MSM family."
    }
  ],
  "kind": "non-torque",
  "value_text": "Standard length\nIN: 101.71—102.31 mm {4.0044—4.0279 in}\nEX: 101.71—102.31 mm {4.0044—4.0279 in}\nMinimum length\nIN: 101.61 mm {4.0004 in}\nEX: 101.61 mm {4.0004 in}",
  "procedure": {
    "notes": "Measure each intake and exhaust valve overall length."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "workshop-bp-turbo-2004",
      "page": "01–10–19 (PDF p. 31)",
      "as_printed": "Standard length\nIN: 101.71—102.31 mm {4.0044—4.0279 in}\nEX: 101.71—102.31 mm {4.0044—4.0279 in}\nMinimum length\nIN: 101.61 mm {4.0004 in}\nEX: 101.61 mm {4.0004 in}",
      "verified_years": [
        2004,
        2004
      ],
      "document": {
        "id": "workshop-bp-turbo-2004",
        "tier": 1,
        "title": "2004 Mazda Engine Workshop Manual BP (1.8L), normally aspirated and turbo",
        "part_number": "9999-95-EWBP-04",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2004,
              2004
            ],
            "engines": [
              "BP-Z3-TURBO"
            ],
            "trans": [
              "6MT"
            ]
          }
        ]
      }
    }
  ],
  "jobs": [],
  "system": "engine",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/valve-length-msm/"
}
```