The OTC Injector Seal Installer and Sizer Adapters, No. 6756, are designed to ensure replacement injectors and seals are installed correctly. This kit installs the dual seals onto the end of the injector since these seals must be installed into their grooves and then sized to the engineered dimension before the injectors are placed into their bores in the cylinder head. The kit includes two seal installation pilots for each groove, a seal installer driver, and a compression sizer. For use on 2010 and later GM engines including 1.4L, 1.5L, 2.0L, 2.4L, 2.5L, 3.0L, 3.6L, 4.3L, 5.3L, and 6.2L.