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Exhaust mod

#1 User is offline   oxhouser 

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Posted 11 April 2012 - 01:34 PM

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....lit=Exhaust+mod
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#2 User is offline   simonix 

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Posted 11 April 2012 - 02:40 PM

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

#3 User is offline   AlexMeineck 

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Posted 11 April 2012 - 02:42 PM

agreed, looks interesting.
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#4 User is offline   benb89 

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Posted 11 April 2012 - 04:25 PM

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

#5 User is offline   martin j 

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Posted 12 April 2012 - 12:00 PM

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.

This post has been edited by martin j: 12 April 2012 - 12:01 PM

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#6 User is offline   ch3tman 

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Posted 12 April 2012 - 12:21 PM

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 :thumbup:, along with any associated costs incurred.



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#7 User is offline   benb89 

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Posted 12 April 2012 - 12:24 PM

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

This post has been edited by benb89: 12 April 2012 - 12:25 PM


#8 User is offline   ross_gerry 

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Posted 12 April 2012 - 04:47 PM

View Postbenb89, on 12 April 2012 - 12:24 PM, said:

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 :)

#9 User is offline   RichwiththeS2000 

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Posted 12 April 2012 - 04:54 PM

View Postchet, on 12 April 2012 - 12:21 PM, said:

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 :thumbup:, along with any associated costs incurred.



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.
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#10 User is offline   ch3tman 

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Posted 12 April 2012 - 05:05 PM

View PostKingRevo, on 12 April 2012 - 04:54 PM, said:

View Postchet, on 12 April 2012 - 12:21 PM, said:

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 :thumbup:, along with any associated costs incurred.



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.

:thumbup:

View Postbenb89, on 12 April 2012 - 12:24 PM, said:

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


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

#11 User is offline   j8mie 

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Posted 13 April 2012 - 03:58 AM

If anyone's interested this is what the inside of the rear cans look like. I think you could easily do away with a lot of those internals and put a dog leg section of pipe in place :shrug:

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#12 User is offline   craigant 

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Posted 13 April 2012 - 05:32 AM

Great thread, very interested in how this turns out.

#13 User is offline   s2konroids 

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Posted 13 April 2012 - 05:56 AM

Good stuff chaps, looking forward to how this pan outs.
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#14 User is offline   benb89 

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Posted 13 April 2012 - 06:02 AM

Im unsure which exhaust to 'bastardise' my current japspeed or the standard system? Also might i mention i dont have a cat in place either

#15 User is offline   rhauri 

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Posted 13 April 2012 - 07:40 AM

Which ever is cheaper and easier to replace I guess?

I'd be very interested in this. I was looking at getting hold of a decat pipe for my S2K but after too many reports of it making no difference to a standard exhaust system I didn't bother. I don't want to go down the route of buying a whole new exhaust system really so this idea is a great one.

I am amongst the many others who can't wait to see the out come of your exhausts Ben, as I'm sure many of us will follow suit.

If you can record before and after videos, it'll be difference that is key really, so it won't matter you have a decat pipe :)



#16 User is offline   benb89 

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Posted 13 April 2012 - 07:47 AM

Iv always been a fan of messing around with exhaust systems and this is a new one for me. Il get some before and afters dont worry ;)

#17 User is offline   rhauri 

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Posted 13 April 2012 - 07:50 AM

View Postbenb89, on 13 April 2012 - 07:47 AM, said:

Iv always been a fan of messing around with exhaust systems and this is a new one for me. Il get some before and afters dont worry ;)


Amazing, can't wait!! :D

#18 User is offline   Nicklincs 

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Posted 13 April 2012 - 10:42 AM

Looks interesting, but i really cannot see how that cant make a massive difference to noise, quite incredible really... but i guess all you have essentially done is bypassed say 25% of the noise straight out of the tailpipe with no silencing.

I'll gladly modify someone's exhaust at work if there are any guinea pigs!

I'm going to get around to making 2 custom silencers for mine within the next few weeks so may contemplate butchering one of my standard exhausts.

#19 User is offline   ross_gerry 

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Posted 14 April 2012 - 07:06 AM

View Postbenb89, on 13 April 2012 - 07:47 AM, said:

Iv always been a fan of messing around with exhaust systems and this is a new one for me. Il get some before and afters dont worry ;)


thats great!! really looking forward to this! I do like the sound of the OEM exhaust its just a shame its not louder, hopefully this might help out a bit :)

#20 User is offline   benb89 

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Posted 14 April 2012 - 07:38 AM

I prefer the sound of oem to my japspeed system

#21 User is offline   ch3tman 

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Posted 16 April 2012 - 02:09 PM

View Postbenb89, on 12 April 2012 - 12:24 PM, said:

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


How did you get on? :)

#22 User is offline   ross_gerry 

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Posted 16 April 2012 - 03:57 PM

View Postchet, on 16 April 2012 - 02:09 PM, said:

View Postbenb89, on 12 April 2012 - 12:24 PM, said:

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


How did you get on? :)


hehe yeh!! do tell do tell

#23 User is offline   oxhouser 

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Posted 16 April 2012 - 05:21 PM

View Postj8mie, on 13 April 2012 - 03:58 AM, said:

If anyone's interested this is what the inside of the rear cans look like. I think you could easily do away with a lot of those internals and put a dog leg section of pipe in place :shrug:

Posted Image

Link


Might be even easier on the S you could just weld a tube from the Infeed tube to the 180 degree bend that would bypas most of the OEM silencer and be very hard to detect

#24 User is offline   dan_bourne 

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Posted 16 April 2012 - 07:02 PM

Might also get rid of that putt putt noise as it has a bit of pipe to mix with other exhaust gasses as well...
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#25 User is offline   benb89 

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Posted 17 April 2012 - 10:18 AM

Iv honestly not had chance to get it in yet. I will post pics and vids up as soon as i do though

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