Dansk exhaust modifying

[avorkinn]

I have a car with the Dansk RSR header and exhaust, sounds great! The problem can be the lawmen, here in Norway they don't like it.

I have found picture of a modified setup, anyone with experience?

Her is also my car on youtube, https://www.youtube.com/watch?v=l_rVqQluQ5o

[mo-mon]

Hi. I have no experience w/ that modified set-up but one way to lower the noise level is to install Quiet Riot baffles-https://www.rocky-mountain-performance.com/

Good luck!

[JJ 911SC]

I'm in for a group buy

[mb911]

I built this setup for a customer and could see this mod as useful.. Would be happy to convert for folks.

[G50911]

nice work ben! curious what something like this would run? i need to get something done for a 3.6 in a 71.

[mb911]

For a 911 just the muffler mod?

[G50911]

did you do the headers too?

[mb911]

Yes but they are 914-6

[911pcars]

Originally Posted by avorkinn

I have a car with the Dansk RSR header and exhaust, sounds great! The problem can be the lawmen, here in Norway they don't like it.

I have found picture of a modified setup, anyone with experience?

Her is also my car on youtube, https://www.youtube.com/watch?v=l_rVqQluQ5o

Is it just me? What looks to be support tabs under the main inlet pipes could be levers to control internal valves to redirect the exhaust to an alternate noise-reduction path/section. If so, a great idea for noise restricted regs. and to maintain neighbor relations.

Better yet, make the gate valves servo-controlled for cockpit-ease (and to adjust the preferred exhaust EFX). Could be the best of both worlds.

Sherwood

[mb911]

Originally Posted by 911pcars

Is it just me? What looks to be support tabs under the main inlet pipes could be levers to control internal valves to redirect the exhaust to an alternate noise-reduction path/section. If so, a great idea for noise restricted regs. and to maintain neighbor relations.

Better yet, make the gate valves servo-controlled for cockpit-ease (and to adjust the preferred exhaust EFX). Could be the best of both worlds.

Sherwood

I think its a jamb nut..

[911SauCy]

+1 that those tabs look like manual cut out levers of a sort.

Why else would there be an alternate route for the exhaust into the muffler?

[911pcars]

Originally Posted by 911SauCy

+1 that those tabs look like manual cut out levers of a sort.

Why else would there be an alternate route for the exhaust into the muffler?

+1
OP’s question was regarding exh noise, then attached that photo.

[mb911]

Becuase this muffler is 100% straight thru.. They actually don't have anything inside.. It is hollow. The pictured one in my post was brand new drop shipped to me and was amazed how it was empty..

[911pcars]

Originally Posted by mb911

Becuase this muffler is 100% straight thru.. They actually don't have anything inside.. It is hollow. The pictured one in my post was brand new drop shipped to me and was amazed how it was empty..

With all due respect, your photo; the muffler attached to the 914-6 headers doesn't appear to be the same as the OP's "4-in" muffler. AFAIK, only the manufacturer knows what's inside and/or what mods were performed by a possible third party.

Sherwood

[mb911]

Originally Posted by 911pcars

With all due respect, your photo; the muffler attached to the 914-6 headers doesn't appear to be the same as the OP's "4-in" muffler. AFAIK, only the manufacturer knows what's inside and/or what mods were performed by a possible third party.

Sherwood

Fairly certain same muffler just modded for the application.. Would be interested in seeing what they did..

[J-Mac]

That modified muffler with manual bypass option is discussed here

Best Muffler For Porsche RSR

[911SauCy]

Originally Posted by j-mac

that modified muffler with manual bypass option is discussed here

best muffler for porsche rsr

bingo...

[G50911]

anyone know if these are available? i followed a couple of the old threads and looks like they produced an MK2 at some point? sorry for the thread hijack.

[mb911]

I believe the un modded ones are.. My project wrapped up in January to give a time line

[jmz]

Originally Posted by mb911

I built this setup for a customer and could see this mod as useful.. Would be happy to convert for folks.

Ben, that looks nice but what did you do precisely? It looks like you nodded the H.E.to work with the 914/6 GT style exhaust. Did you do anything to quiet the muffler down?