M14X1.25X3/4" SPARK PLUG Helical Insert QTY-6 M14 x 1.25 x 3/4" spark plug helical insert qty-6 CHR88050 $9.500/ea
M18X1.5 x 1/2" SPARK PLUG Helical Insert QTY-6 M18 x 1.5 x 1/2" spark plug helical insert qty-6 CHR88051 $20.300/ea