| NGK Spark Plug Letter Code | Spark Plug Socket Size |
| B | 13/16 in or 21 mm |
| C | 5/8 in |
| D | 18 mm |
Footer
Become a Reseller
Want to sell Cyclepedia Manuals? Join the Cyclepedia Reseller network by becoming an online affiliate. There's no inventory to take on, nothing to ship and no customer service to deal with. We take care of everything. Learn More
Contact Us
Cyclepedia Press, LLC 42 Wooten Cove Road Suite 2 Weaverville, NC 28787 · USA phone: 828-645-0017 Contact Us
