Came across this on the z4 forum, simple and apparently makes the stock back boxes sound better, could be a solution for the S
http://www.z4-forum.com/forum/viewto...it=Exhaust+mod

 

This seems very interesting! Worth a punt if you know somewhere to get them fabbed up.

 

agreed, looks interesting.

 

I might have a go at this iv got a spare stock exhaust

 

Mmm, surprised no one has thought of this before, seems to easy to be good. Let us know what happens if you do try it benb89.

 

Interesting, a few thoughts:

- What effect, if any, would this have on MOT testing?
- What implications, if any, would this have on declaring 'modifications' to the insurance company?

benb89 - let us know how this goes if you go ahead with it. Pics and video would be great , along with any associated costs incurred.

 

Il take the system to my exhaust guy tomorrow or monday at latest. Il get full pics during and after

 

sounds good!! im really interested to see how this turns out too

 

It all comes after the cat so wont affect MOTs/emissions or anything. Its just bypassing the last silencers a bit.

You could tell your insurance company you have a custom exhaust, didn't cost anything extra when I declared mine. They'd never notice/care/anything if you didn't though.

 

Videos before and after showing the audible differences [i.e. at idle, revving] would be great, if possible .