Iridium Spark Plug Set [Mk3 Focus RS] 2.5 Duratec Important please read: In order

Important please read: In order to achieve and maintain performance and reliability

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

It doesn't just look light either

whilst blocking a minimal surface area of the radiator and causing a negligible affect on the radiators performance

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 Important please read: In orderEcoBoost 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