Equivalents for the Autolite spark plug 421
Autolite 421 is a spark plug featuring thread 14 mm, heat range medium, tightening torque fonte 25–35 N·m · alu 25–30 N·m — ou 180°–240° (½–⅔ tour), reach 12.7 mm. Browse its 492 equivalents: compatible, interchangeable and replacement spark plugs across NGK, Bosch, Champion, Denso and many more.
Technical information Autolite 421 spark plug
- Torque
- fonte 25–35 N·m · alu 25–30 N·m — ou 180°–240° (½–⅔ tour)
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492 equivalents compatible with the Autolite 421 spark plug
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No equivalent for this brand selection.
What can replace a Autolite 421 spark plug?
The Autolite 421 is interchangeable with: NGK BR7HS, Bosch W2AC, Champion L78C, NGK BR8HS, Bosch W3AC, Bosch W7AC. These spark plugs share the same mounting (thread, seat) and heat range.
What are the specifications of the Autolite 421?
Thread 14 mm, Reach 12.7 mm, Heat range Medium, 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.