Spark plug · NGK
Equivalents for the NGK spark plug GR 4
NGK GR 4, a spark plug. Find its 615 compatible and interchangeable spark plugs: cross-references for NGK, Bosch, Champion, Denso and every brand.
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615 equivalents compatible with the NGK GR 4 spark plug
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What can replace a NGK GR 4 spark plug?
The NGK GR 4 is interchangeable with: NGK C7E, Bosch F002G40509, Champion R8, NGK CR7E, NGK CR7EB, NGK CR7EK. 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.