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The Big-Sert 5141E-469 M14 x 1.25mm is an extended reach oversized spark plug thread repair kit. The extended tooling in the 5141E kit makes working down into a deep port much easier.
The Big Sert 5141E-469 thread repair kit is for second time repair where the previous repair has failed. The outside thread of the Big-Sert is M18 x 1.5, the stripped hole should not be larger than 16.3mm or .640 inches.
The Big-Sert 5141E-469 includes 8 assorted length inserts