Heli-Coil serrated aviation inserts are the only FAA approved method of repairing damaged spark plug threads, also the only method certified by Continental and Lycoming. Kits contain everything you need, part number is for the 18 mill kit, 14 mill can be ordered specially.
| Part Number | Description | Stock | Price | |
| 4260-18 | HELICOIL 18MM KIT | 1 | £1.00 | |
