Denso ITV24 Spark Plug Set The EcoBoost engine operates under extreme conditions including high cylinder pressures. The spark plugs are subject to rapid wear rates, even at standard performance levels. Engines running higher boost points or increased levels of tuning 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 optimized for increased power insures maximum performance. The Denso ITV24 High Performance Spark Plug is two steps colder than the original spark plug and perfect for those big power applications like cars with larger than stock turbochargers and other significant engine modifications. The ITV24 features Denso's patented U-Groove technology allowing for more complete combustion even in high cylinder pressures conditions. Price is for a set of 4. Application: Focus ST 2013-2016 Focus RS 2016 Mustang EcoBoost 2015-2016 Features: Smoother acceleration Perfect for high boost street use Advised Plug Gaps for Following Applications are: MK3 RS - 0.026" Mustang EcoBoost - 0.026" MK3 ST - 0.028"
