jamie_z4 said:Secondary air pump
jamie_z4 said:Secondary air pump
Beedub said:the ///M model has one, its a large noisy fan that blow O2 to help the cats get up levels efficiency quicker. The s54 is a big poluter so I'm guessing it needed all the help it could get.
Yep, the Alpina has one too...Beedub said:the ///M model has one, its a large noisy fan that blow O2 to help the cats get up levels efficiency quicker. The s54 is a big poluter so I'm guessing it needed all the help it could get.
jamie_z4 said:The e46 323i/328i has one too, using the m52 engine