Spark plug · ACDelco
Equivalents for the ACDelco spark plug 41-121
ACDelco 41-121, a spark plug. All its 38 replacement references: compatible and interchangeable equivalents — NGK, Bosch, Champion, Denso…
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38 equivalents compatible with the ACDelco 41-121 spark plug
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What can replace a ACDelco 41-121 spark plug?
The ACDelco 41-121 is interchangeable with: NGK BKR7EIX, Bosch FR6KII332S, Denso IK22, NGK BCPR7EIX, NGK BKR7EIXP, NGK IFR7U. These spark plugs share the same mounting (thread, seat) and heat range.
Cross-references and specifications are provided for guidance only. The wrench size can vary by brand, and some data is inferred from the plug code or an equivalent reference. Always check the vehicle manufacturer's recommendation before buying and fitting.