TIME-SERT 1812 M8x1.25 Metric Thread Repair Kit. Inserts included are 11.7mm. Note this kit is NOT for GM rocker arm thread repair (the reamer has fewer flutes and may break because of snagging on the rocker arm line-up slot). See the Time Sert 1812CORE kit for first time GM Rocker Arm Thread Repair.

Time-Sert Metric Thread Repair Kits

KIT CONTAINS

Drill

Counterbore

Tap

Installation Driver

5 Steel Inserts M8x1.25 Metric PN 18121 

11.7mm Length Inserts

Time-Sert Metric Thread Repair Demonstration Video