I don't have any spare lines to measure, but does anyone know the specs (length & diameter) on the stock oil cooler lines? i got an aftermarket oil cooler but depending on the position of it i my have to lengthen the lines to make sure they fit without issues

10 feet or 3 meters of 3/8in or 10mm.
They have probably already been replaced one before, the factory lines were poor s.h.i.t.