Focus RS 2016+ with 2.3 4 cylinder EcoBoost engine
For use in engines with higher than stock cylinder combustion pressures
Two heat ranges colder than the stock 2.0L EcoBoost engine spark plug
Same spark plugs that are included with M-9603A-FST Performance Calibration kit
Sold in engine sets of 4
Spark plugs gapped to 0.028-inch (0.71mm)
This part has been designed and is intended for off-highway application only. Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations relating to emission requirements and motor vehicle safety standards.
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