Equivalents for the First Line spark plug FGP121
Meet the First Line FGP121 spark plug with heat range hot, reach 15.2–19.0 mm. Find its 180 compatible and interchangeable spark plugs: cross-references for NGK, Bosch, Champion, Denso and every brand.
Technical information First Line FGP121 spark plug
- Resistor
- no
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180 equivalents compatible with the First Line FGP121 spark plug
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- A
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- K
- K
- K
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- A
- A
- A
- L
- H
- H
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- S
- A
- S
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- V
- V
- A
- S
- S
- A
- S
- S
- A
- S
- S
- A
- A
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- S
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- L
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- M
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- I
- I
- I
- I
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- J
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- A
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- H
No equivalent for this brand selection.
What can replace a First Line FGP121 spark plug?
The First Line FGP121 is interchangeable with: Bosch CH215, Champion W803, Denso G144, Bosch GLP031, Champion CH215, Champion GX124. These spark plugs share the same mounting (thread, seat) and heat range.
What are the specifications of the First Line FGP121?
Reach 15.2–19.0 mm, Heat range Hot, Resistor no, Seat Flat (gasket)
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.