TPI 350 spark plugs
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TPI 350 spark plugs
Today I opened #1 spark plug and I noticed that half of the thread is black and the electrode is white(its platinum and .750" reach) and Im worried about it,My Camaro got MSD 6A,MSD wires and MSD coil and I want to know what causing the black carbon on half of the thread and the white thing on electrode and what reach is the stock spark plugs for TPI 92 Camaro iron heads?
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