OTC Tools 7219 Oil Pressure Adapter Allows for engine oil pressure to be measured Installs in place of oil filter providing ports to attach oil pressure tester Dual port for bottom or side tester connection Installs with 11/16" (17mm) hex drive socket Fits GM 4.8L, 5.3L, 5.7L, 6.0L engines, 1996-2006, similar to J-42907