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When a spark plug blows out of a cylinder head, it’s a bad day for any vehicle owner. For technicians and DIYers alike, finding a reliable, permanent fix that doesn’t require removing the entire cylinder head is the ultimate goal. While certain makes and models are notorious for this issue, the Wise Auto Tools Spark Plug Thread Repair Kit (Part # 4412S-187) is the versatile, heavy-duty solution engineered to handle the industry’s biggest problem children—even when working …