![Iridium Spark Plug Set [Mk8 Fiesta ST | Puma ST | Focus 1.5 | Kuga 1.5]](http://www.mountunestore.com/cdn/shop/products/2709-ISP-AA_2048x.png?v=1619090807)
2709-ISP-AA
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:
Features:
Please note: Supplied in a pack of 3 plugs.
United KingdomEasy to use comprehensive website, fast deliver, excellent products
United KingdomThis is the 3rd set I've fitted now with a noticeable difference on idle and throughout the Rev range as the cars driven hard occasionally. oil and filter every 6 months. And plugs every 12 preventative maintenance! Coil packs pistons and valves cost alot more
Belgiumsmoother driving
![Iridium Spark Plug Set [Mk8 Fiesta ST | Puma ST | Focus 1.5 | Kuga 1.5] - Customer Photo From Lee M Gee-Brown](https://cdn.stamped.io/uploads/photos/535_6665498591426_f7bbb32c_18b8_4b73_b7bd_f51a2c26cea1.jpg?v=)