NGK (LTR7IX-11) Iridium IX Spark Plugs 2013-2017 Ford Focus ST/RS EcoBoost | 6510 universal This will be determined by

This will be determined by the BUILD DATE (not model year)

and harshness

Access to online map database with free updates

Billet 6061-T6 Construction

Oil filters can only catch so much

NGK (LTR7IX-11) Iridium IX Spark Plugs 2013-2017 Ford Focus ST/RS EcoBoost | 6510 universal This will be determined byFitment Information: 2013 2017 Focus ST RS EcoBoost Features: Trivalent metal plating provides superior anti corrosion and anti seizing properties Corrugated ribs prevent flashover Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer Copper core aids in heat removal Triple seals prevent leakage Longevity: 50k Miles 60 Days Manufacturer Warranty Shell Spark Plug Thread Diameter: 14mm Thread Pitch: 1. 25mm Seat