NGK Iridium IX Spark Plugs 6510 (LTR7IX-11) - Set of 4

Set of 4 NGK 6510 LTR7IX-11 Iridium IX Spark Plugs

The NGK 6510 (LTR7IX-11) Iridium IX Spark Plug is a high-quality performance-specification component designed as a one-step colder upgrade for various Ford EcoBoost engines. It offers improved ignition performance, superior anti-fouling, and a long service life under high-temperature and high-boost conditions.

This spark plug is a direct-fit performance upgrade for the following Ford Ecoboost Engines:

• 1.5L, 1.6L, 2.0L, and 2.3L EcoBoost engines

• Ford Fiesta ST (Mk7 & Mk8)

• Ford Focus ST / RS (Mk3)

•  Ford Mustang (EcoBoost)

• Ford Puma ST

  • Code Segment	Meaning
    I	Iridium center electrode
    LZ	Short shell + resistor suppression
    K	Two ground electrodes
    B	14 mm/1.25 mm/16 mm hex
    R	Gasket seat
    7	Heat range 7
    B	Specific thread reach/insulator length
    8	Pre‑set spark gap, approx. 0.8 mm
    G	Fine-wire firing end construction

  
  

  Spanner Size	16 mm
  Thread Size	M14 x 1,25
  Thread Length	25 mm
  Spark Plug	Iridium Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with tapered seat
  Spark Position	5 mm
  Version	Bi-Hex