Quick's right...those plugs are designed for long life...not so much performance. It's kinda unlikely they really hurt anything, but good old fashioned plugs are the way to go. Don't fall for fancy gimmicky plugs either. They're more fluff than stuff since a plug is basically a plug exept for the materials.
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1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s
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