The AC 44 plugs are not aviable here in Germany. So I went to a Bosch Shop and asket them if they can cross reference a Bosh plug.

The guy came up with a Bosch "Super 4" Type WR78G
[img]http://aa.bosch.de/aa/de/static/produkte/zuendkerzen/super4/img/super4_anim.gif[/img]

"It operates on the air-cushion-spark principle and it featurees four thin ground electrodes with one pointed, silver-plated center electrode.
The ignition spark always chooses the best path for reliable ignition according to the engine load.The electrode is gap adjusted and fixed ex factory.

The sparks are distributed evenly around the insulator nose. If the insulator nose is contaminated at any point (e.g. with soot), the spark will skim over the contamination and jump from there to the nearest ground electrode. In such a case, the spark also simultaneously burns off the dirt."

Some guys told me it would make no big difference, wich was right with my Chrysler Voyager, but on the 235 it is a difference like day and night.

Better starting, smoother idling and noticeable better response.

More information can be found here

Frank