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40 reviews

2536-ISP-AA

Iridium Spark Plug Set [Mk3 Focus RS]

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:
Focus RS 2016-2018

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 40 Reviews
5 ★
100% 
40
4 ★
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Filter Reviews:
    KF
    24/12/2021
    Kevin F.
    France France

    Parfait

    Je recommande produit de bonne qualité

    RS
    28/10/2021
    Ralph S.
    Switzerland Switzerland

    Super fast Delivery

    Everything okay, thanks

    mountune Iridium Spark Plug Set [Mk3 Focus RS] Review
    CB
    20/10/2021
    Clive B.
    United Kingdom United Kingdom

    Iridium spark plugs mk3 Focus RS

    All ready gaped.easy fit. notice the difference when cold at startup