Complete Wet Nitrous System2011-2019 Dodge Charger, Challenger 6.4L2011-2019 Chrysler 300 SRT 6.4L80 mm Nitrous PlateMini 2-Stage Progressive ControllerAdjustable From 75, 100, 125, 150 HPBlue 10 lb. Bottle Installation Notes:Sparks plugs 1-2 steps colder than factory specification are recommended. Do not use projected tip, fine wire or iridium spark plugs with this nitrous kit.If jetting for power levels above 75 HP, high octane racing fuel is highly recommended.If modifying for jetting power levels above in excess of 200 HP, a complete fuel system upgrade is highly recommended.Emissions.