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NGK 4521 - Possible spark plugs for

Details about NGK 4521:

Threaddiameter: 14.0 mm
Hexsize: 20.8 mm

Alternative spark plugs for NGK 4521:

Brand	Model
Denso	IRE01-27
Denso	IRE0127
Mazda	086818600

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The Spark Plug Cross references are for general reference only. Check for correct application and spec/measurements. Any use of this cross reference is done at the installers risk.