Question, do the 3.5 guys need to worry about replacing their factory spark plugs? When I first got my charger that's one of the first things I researched, but read how the oem plugs don't need changing till 100,000 miles, but the 2.7 and hemi's need to be changed sooner. Will changing the plugs make that much of a difference in performance? My car is reaching 25,000 miles.
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2007 Dodge Charger SXT
Performance Mods: K&N CAI, Modern Muscle Ported Throttle Body, JBA Shorty Headers, Dynomax Ultra Flo Cat-back (Single-Exit) Exhaust, PredatorCharged!!! - 89 Octane Canned Tune w/ 89 octane + ACES IV, Mobil 1 Motor Oil & QuantumBlue Gold HP Coolant. Exterior Mods: Window Tint (35% fronts, 20% backs), Rally Stripes, Daytona Style Rocker Panel Stripes w/ Honeycomb Mesh Grille.