EU customers, please read before purchasing

Important Info

Search

Search our store

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 49 Reviews
5 ★
100% 
49
4 ★
0% 
0
3 ★
0% 
0
2 ★
0% 
0
1 ★
0% 
0
Customer Photos
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
    SH
    06/02/2023
    shaun h.
    United Kingdom United Kingdom

    spark plugs

    the service is really quick am well happy with the product wouldnt use nothing but mountune

    SA
    15/11/2022
    Sacha A.
    Netherlands Netherlands

    Quick and efficient

    Top quality service and parts. They have a lot of great products for my car. My car is so much better now. ;-) Highly recommended.!

    DL
    17/10/2022
    DAVID L.
    Reunion Reunion

    Serious Store

    fast shipping, correct item