NGK STK 4421 - Possible spark plugs for

Alternative spark plugs for NGK STK 4421:

Brand Model
ACDelco FR3LS
ACDelco FR4LSJ
Autolite 3926
Autolite 5184
Beck Arnley 176-5250
Beck Arnley 176-9064
Bosch FR8DCX
Bosch stk 7557
Champion RC12YC
Champion stk 71
Denso Q16PR-U11
Denso stk 5016
General Motors 5613796
General Motors 5614241
Mopar 56006240
NGK BKR4E

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SPARK PLUG CONVERTER

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.
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