Equivalents for the Napa spark plug X503
Napa X503 is an automotive spark plug : reach 19.0–20.5 mm, heat range very hot, thread 14 mm, tightening torque fonte 25–35 N·m · alu 25–30 N·m — ou 180°–240° (½–⅔ tour). Here are its 52 cross-references: equivalent, compatible and replacement plugs from NGK, Bosch, Champion, Denso and other makers.
Technical information Napa X503 spark plug
- Resistor
- no
- Torque
- fonte 25–35 N·m · alu 25–30 N·m — ou 180°–240° (½–⅔ tour)
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What can replace a Napa X503 spark plug?
The Napa X503 is interchangeable with: Bosch W9EC0, Champion J6C, Denso W17-U, Champion J6C/038, Champion J6C/053, Champion J6C/058. These spark plugs share the same mounting (thread, seat) and heat range.
What are the specifications of the Napa X503?
Thread 14 mm, Reach 19.0–20.5 mm, Heat range Very hot, Resistor no, Seat Flat (gasket), Torque fonte 25–35 N·m · alu 25–30 N·m — ou 180°–240° (½–⅔ tour)
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.