Specification
Brand
Autolite
Item Number
403
Center Electrode Core Material
Copper
Center Electrode Design
Standard
Center Electrode Projection
Short Projection
Center Electrode Tip Material
Nickel
Electrical Connector Type
Removable Nut
Ground Electrode Core Material
Nickel
Ground Electrode Quantity
1
Ground Electrode Tip Design
Tapered
Ground Electrode Tip Material
Nickel
Hex Size
13/16 in / 21 mm
Insulator Material
Ceramic
Pre-Gap Size
0.034 in / 0.9 mm
Reach
0.75 in / 19.05 mm
Resistance
5000 Ohms
Resistor Type
Yes
Seat Type
Flat
Thread Diameter
14 mm
Description
The Autolite 403 Copper Resistor Spark Plug is engineered to deliver quick starts and optimal performance. Featuring a solid copper core center electrode, it ensures excellent thermal and electrical conductivity. The high alumina multi-rib insulator prevents flash-over, reducing misfires. Designed with a nickel-plated shell for corrosion resistance, this spark plug offers durability and reliability for various driving conditions.
Disclaimer
Ensure compatibility with your vehicle before purchase. Installation should be performed by a qualified technician. Follow all safety guidelines during installation.