My NGK Iridiums are working real well for me. Much smoother than old factory plugs with 33,000 miles on them!! As soon as I installed those plugs at the factory gap of .052 I could feel the smoothness. I dont have any dyno numbers and gas mileage only changed about .2 mpg.
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06 GT Auto, Cool Vanila Exterior, Presto Change O 3bl, Cargo Mat and Net, Billet Oil Cap, Yoko Avid 4Vs Tires, 03 GT Wheels, 4 Chrome Door Handle Screw Covers, MOPAR Mud Flaps, H&R Rear Sway Bar, Freedom Strut Tower Bar, Rear Door Sill Covers.
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