Technical specifications:

Key width 20.8 mm
External thread [mm] 14.0 mm
Thread length [mm] 19.0 mm
Spark plug unscrewed SAE connection

Nickel middle electrode

1-earth electrode

undisturbed

with flat density
Sparking [mm] 3.0 mm



Comparative numbers Spark plugs

Bosch BERU NGK
W9DC 14-8DU BP5ES

NGK spark plug

High quality at a reasonable price.

Details:

    from the No.1 of the original equipment manufacturer
    Excellent ignitability
    long lifetime

Dimensions (approx.):
The article name / selection field contains the following values: threaded Ø / thread length / hexagonal key width - in mm

Attention - assembly instructions:
Spark plugs must generally always be mounted with a suitable torque wrench for a professional Monday.
In order to avoid damage due to a non-proper installation on the spark plug and thereby on the engine, absolutely avoid this with the following values:
Aluminum cylinder head = 15-20 nm
Cast iron cylinder head = 15-25 nm