![Iridium Spark Plug Set [Mk4 Focus ST] - Fully Fitted Air Filter The mountune Billet Front Exhaust](https://cdn.shopify.com/s/files/1/0367/2621/products/isp-aa_171fc1af-1c1f-4ac5-83ca-6d48becf3d27.png?v=1675767982)
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The mountune Billet Front Exhaust Brace
6 EcoBoost
mk2 Focus ST and mk3 Focus ST
as a custom part
Iridium Spark Plug Set [Mk4 Focus ST] - Fully Fitted Air Filter The mountune Billet Front ExhaustThe 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
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