BIG-SERT M14x1.25 SPARK PLUG KIT EXTENDED WITH ASSORTED INSERTS P/n 5141E-469 BIG-SERT OVERSIZED EXTENDED SPARK PLUG REPAIR KIT for use when a helicoil has failed P/N 5141E-469 M14x1.25 BIG-SERT kit includes 8 assorted length inserts Reliable Fast Permanent repair P/N 5141E-469 Professional repair tools for a high quality repair Used after helicoil failure or inserts .660 or smaller in diameter