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2709-ISP-AA

Iridium Spark Plug Set [Mk8 Fiesta ST | Puma ST | Focus 1.5 | Kuga 1.5]

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 2017-current
  • Puma ST 2020-current
  • Focus 1.5 (3-cylinder, 150PS / 180PS) 2018-current
  • Kuga 1.5 (3-cylinder, 150PS) 2019-current

Features:

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

Please note: Supplied in a pack of 3 plugs.

Customer Reviews
5.0 Based on 11 Reviews
5 ★
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Filter Reviews:
    VN
    12/04/2022
    Vlad N.
    United Kingdom United Kingdom

    Very good product

    Easy to install on the MK4 Focus and very well made. As stated, acceleration is smoother especially in the lower revs and the engine feels more responsive. It must be said that it was installed along with the Mountune High-Flow throttle body elbow, so I'm very pleased about the overall results.

    OD
    06/04/2022
    Old D.
    United Kingdom United Kingdom

    Plugs you should have

    A must have if you’re going to improve the performance of your engine.

    S
    23/03/2022
    Simon
    United Kingdom United Kingdom

    Usually quality Mountune service

    Great service, having the plugs come pre-gapped saves lots of hassle. Fitting due to M235/M260 install and a no-brainer to fit these at this cost.