Brisk Silver Racing Spark Plug Set (4 pcs) 2014-2019 Fiesta ST *FREE SHIPPING*

BRISK Silver Racing RR12S & RR14S Spark Plug 14mm thread, 25mm reach, 5/8'(16mm) hex, tapered seat, non-projected tip, resistor, fine wire 1.5mm Silver center el., Cut-back ground electrode *RR14S is 1 step colder than the OEM Fiesta spark plug.  Factory gapped at .028 *RR12S is 2 steps colder than the OEM Fiesta spark plug.  Factory gapped at .025 The RR14S is perfect for stock to 300whp applications.  We suggest the RR12S for big turbo, over 300whp applications  *custom gapped spark plugs sets ship in 5-7 business daysBrisk Silver Racing plugs have a better ignitability than conventional performance spark plugs, and offer better performance and reliability in high boost, nitrous or high compression applications. Silver is an element with the most free electrons, and is the best electrical and thermal (heat) conductor of all metals! Better than gold, copper ...and many times better than Iridium. The Brisk Silver Racing plugs have a fine wire center electrode (not just the tip), w