It is a 11V glow plug that we manufacture to replace the following codes corresponding to our ref. GX 2119 4,4V, and specially conceived to fit Fiat and Opel 1.3 JTD when substituting the engine on the elder vehicles: FIAT 55210051 (4,4V), OPEL 18 26 357 e 55 564 219 (4,4V), BERU GE112 -0100266025 – 0100266031 (4,4V) The new engine will be in fact equipped with 4,4V glow plugs but powered by the original wiring at 11V. No glow plugs can be actually found on the market suitable to be installed in such circumstances, hence the need of a new model.