Iridium Spark Plug Set [Mk3 Focus RS] 2.5 Duratec This vapour can create a

This vapour can create a buildup of carbon deposits on the intake valve and can lead to reduced engine performance

This product allows the discerning Mk4 Focus owner to add a touch of mountune to their car and is available in satin black

3L Ford Duratec

It doesn't just look light either

MR165 calibration should NOT be installed on vehicles not equipped with the correct mountune hardware

Iridium Spark Plug Set [Mk3 Focus RS] 2.5 Duratec This vapour can create aEcoBoost 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