Autolite 403 Copper Resistor Spark Plug FCM5000 Constructed from durable impact-modified acrylic

Constructed from durable impact-modified acrylic material

they feature a durable textured black powder coat finish

Model: 25435

2021 / GMC Sierra 1500 4WD & RWD 2019

Autolite 403 Copper Resistor Spark Plug FCM5000 Constructed from durable impact-modified acrylicFeatures: MAXIMUM PERFORMANCE: Every Copper Spark Plug has a full copper core electrode which provides higher thermal conductivity for better performance in all conditions IMPROVED DURABILITY: All Autolite spark plugs are Leak proof and come with a heat fused internal seal for long lasting durability CONSTRUCTION: These replacement spark plugs have a copper glass seal which bonds the insulator and the terminal post center electrode together FUEL