![Iridium Spark Plug Set [Mk4 Focus ST] - Fully Fitted Mats 5-litre EcoBoost](https://cdn.shopify.com/s/files/1/0367/2621/products/isp-aa_171fc1af-1c1f-4ac5-83ca-6d48becf3d27.png?v=1675767982)
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5-litre EcoBoost
at the track
Engineered Helmholtz resonator for a less intrusive
Compatible with Mk6 Fiesta ST
mountune gen2 design - the perfect engine bay dress up companion product for the mountune billet oil filler cap and oil filter housing
Iridium Spark Plug Set [Mk4 Focus ST] - Fully Fitted Mats 5-litre EcoBoostThe mountune Iridium Spark Plug Set is pre gapped by mountune to the optimised setting. 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. This product includes a fixed labour charge for installation at mountune HQ in Hutton, Essex. This is a comprehensive drive in, drive out