Equivalents for the Napa spark plug X571
Meet the Napa X571 spark plug featuring thread 18 mm, reach 12.7 mm, tightening torque fonte 35–45 N·m · alu 35–40 N·m — ou 180°–240° (½–⅔ tour), heat range very hot. 150 equivalents listed: interchangeable and compatible spark plugs across all brands — NGK, Bosch, Champion, Denso…
Technical information Napa X571 spark plug
- Resistor
- no
- Torque
- fonte 35–45 N·m · alu 35–40 N·m — ou 180°–240° (½–⅔ tour)
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What can replace a Napa X571 spark plug?
The Napa X571 is interchangeable with: Bosch M8AC0, Champion D16, Denso M16R-U, Bosch D8C, Bosch D8AC, Champion RD14*. These spark plugs share the same mounting (thread, seat) and heat range.
What are the specifications of the Napa X571?
Thread 18 mm, Reach 12.7 mm, Heat range Very hot, Resistor no, Seat Flat (gasket), Torque fonte 35–45 N·m · alu 35–40 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.