Autolite AR133 : Spark Plug, Racing, 14mm Thread, 0.460" Reach, Tapered Seat, Non-Resistor, Each
AUT-AR133
Designed Specifically for racing applications. New cooler running sidewire providing improved durability and less risk of pre-ignition. New Yttrium-Enhanced alloy enables up to 8% reduction in sidewire temperature. Cut back ground electrode providing improved ignitability Anti corrosive Nickle plating.
Installation Instructions: Do not remove when engine is hot.
Tapered Seat (Gasketless): 1/16 turn after finger tight
Gasket Seat: 1/4-1/2 turn after finger tight.
Installation Instructions: Do not remove when engine is hot.
Tapered Seat (Gasketless): 1/16 turn after finger tight
Gasket Seat: 1/4-1/2 turn after finger tight.
- Free domestic shipping over $99
Racing Helmets
| helmet | size | measurement | metric |
| XS | 6-5/8 to 6-3/4 | 20-7/8 to 21-1/4 | 53 to 54 |
| S | 6-7/8 to 7 | 21-5/8 to 22 | 55 to 56 |
| M | 7-1/8 to 7-1/4 | 22-3/8 to 22-3/4 | 57 to 58 |
| L | 7-3/8 to 7-1/2 | 23-1/8 to 23-1/2 | 59 to 60 |
| XL | 7-5/8 to 7-3/4 | 23-7/8 to 24-1/4 | 61 to 62 |
| 2XL | 7-7/8 to 8 | 24-3/4 to 25-1/8 | 63 to 64 |
CMR Helmets
| helmet | size | measurement | metric |
| XS | 6-1/2 to 6-5/8 | 20-1/2 to 20-7/8 | 52 to 53 |
| S | 6-3/4 to 6-7/8 | 21-1/4 to 21-5/8 | 54 to 55 |
| M | 6-7/8 to 7 | 21-5/8 to 22 | 55 to 56 |
| L | 7-1/8 to 7-1/4 | 22-3/8 to 23-3/4 | 57 to 58 |
Rookie Helmets
| helmet | size | measurement | metric |
| One size | 6-3/4 to 7 | 21-1/4 to 22 | 54 to 56 |
