Spark Plugs for Vanguard Engines. Kit includes 2 spark plugs.
| Motor HP | Mods | Plugs |
| 37 | Stock | RC12YC / 491055T |
| 37 | Delta 3 | NGK4 |
| 37 | Delta 3.5 | NGK6 |
| 40 | Stock | RC12YC / 491055T |
| 40 | Delta 3 | NGK6 |
| 50 | Stock | NGK6 |
Please allow 1-5 Business Days for orders to process.
