NGK Spark Plugs HEMI (5.7L, 6.4L) Supercharged or Non-Supercharged vehicle:Supercharged - Iridium XI Using sand paper on flat

Using sand paper on flat pulleys and a wire brush on ribbed pulleys is effective method to clear debris and burns from a pulley

Many Dynometers read in different net output depending on manufacturer

The RTD will connect your vehicle's OBDII port to the HP-Tuner's app on your smartphone

Key Features:

NGK Spark Plugs HEMI (5.7L, 6.4L) Supercharged or Non-Supercharged vehicle:Supercharged - Iridium XI Using sand paper on flat*Select if your vehicle is SUPERCHARGED or NON Supercharged before ordering* NGK Iridium IX Spark Plugs supercharged vehicles (16 pack) The Spark Plug serious enthusiasts rely on. Designed specifically for the performance enthusiast with supercharged vehicles! Iridium IX offers extreme ignitability, improved throttle response, and superior anti fouling. We recommend the Iridium IX spark plug! These are a great addition to upgraded RIPP high