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4 reviews

2364-ISP-AA

Iridium Spark Plug Set [Mk7 Fiesta ST]

EcoBoost engines running substantially higher boost pressure or increased levels of tuning compared to the OE power output can experience reduced spark plug life resulting in lower engine performance, misfires and rough idle.

Increased wear is typically seen in the form of increased spark plug gap and degradation of the electrode. Using spark plugs that are optimised for increased power ensures maximum performance.

Extensive in-market validation at extreme boost / cylinder pressures was undertaken to ensure optimal performance was achieved, whilst also making sure reliability and drivability wasn't compromised in colder ambients.

Each set is supplied pre-gapped by mountune to optimise the setting and allow for easier end-user installation.

The NGK LTR71X-II is one step colder than the original spark plug.


Applications:

  • Fiesta ST 2012-2017

Features:

  • Smoother acceleration
  • Perfect for high boost applications
  • Supplied pre-gapped by mountune

Please note: Supplied in a pack of 4 plugs.

Customer Reviews
5.0 Based on 4 Reviews
5 ★
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Filter Reviews:
    DE
    06/02/2022
    David E.
    United Kingdom United Kingdom

    Iridium Spark Plug Set [Mk7 Fiesta ST]

    Replaced the standard Ford plugs with these when going from 215 to 230 as it gives me more confidence when driving the car hard.

    TM
    17/10/2021
    Tim M.
    United Kingdom United Kingdom

    New Plugs

    Great, cant really say how good the plugs are as they went on with M285 upgrade. Overall service on the day was top notch!

    A
    16/08/2021
    Anonymous
    United Kingdom United Kingdom

    Spark plugs

    Working perfectly.