Exhaust.

[Espen]

I'm about to change exhaust on my plus, but i wonder if I should make
one pipe in 3,5" or two pipes in 3". anyone here who wants to give me a tip, or someone who has experienced the differences.

Greetings
Espen

[Karl]

The original exhaust has two pipes, one pipe has a diameter of circa 2.1". Therefore the whole diameter of both pipes is 3" , thats suffice rather till 400hp.
You can get problems with the ride height at the rear axle, because the 3.5" pipe or the two 3.0" pipe are too low.

[Roland Müller]

...another question in this connection:

- is Switzerland the only one country, which has 55mm exhaust-tubes instead of the 60mm, which are common in Germany

- what could be the reason therefore?