E3 Spark Plug E3.40 Automotive Spark Plug, Pack of 1 037495423144 Air-lock rated trims are pre-gasketed

Air-lock rated trims are pre-gasketed for minimum air leakage with ic housings

clamp-down caps feature highly conductive corrosion-resistant brass inserts for unrestricted spark-energy flow

The studs assist in keeping the gasket in position during assembly

Functional and stylish

E3 Spark Plug E3.40 Automotive Spark Plug, Pack of 1 037495423144 Air-lock rated trims are pre-gasketedBrand E3 Spark Plugs Model E3. 40 Near elimination of performance inhibiting carbon deposits, dramatically longer plug life and a 5 year 100,000 mile limited warranty DiamondFire electrode technology that creates a superior spark and resulting flame front extending further into the cylinder, producing more localized pressure Significant potential power increase: > 6% to 12% (depending on engine class) Significant potential fuel efficiency improvement: