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Porsche News
Motoring Editor
Joined: 08 Feb 2008
Posts: 7061
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 Posted: Wed Feb 23, 2011 11:07 pm Post subject: 911 PSE Exhaust Hack also known as 'Gundo Hack'
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A "GUNDO HACK", is turning a stock 997 muffler into a PSE (Porsche Sport Exhaust).
This is accomplished by welding a 1.5"-2" pipe connecting the 2 pipes of the muffler. It creates a much deeper and louder sound than stock, similar or better than the PSE.
This can be done by any local garage or exhaust specialist for about £250-£400 (prices do vary!)
Just remove mufflers, take them to a muffler shop and show them these pictures, and say: "DO THIS!"
Here are some POST PSE HACK (Gundo hack) PICTURES:
BTW the "GUNDO HACK" is called that because it was popularized by a USA Porsche owner Gundo, after he posted pictures and explanations and decided to do the hack with a larger diameter pipe (2").
Prior it was just called PSE HACK.
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Last edited by Porsche News on Wed Nov 05, 2014 9:52 pm; edited 1 time in total
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Oli.
Trainee
Joined: 06 Aug 2010
Posts: 96
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| Posted: Wed May 25, 2011 9:19 pm Post subject: Gundo hack underway
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Following my previous thread on the Milltek back boxes, I have now purchased a second set of back boxes, which are having the gundo hack exhaust modification carried out as we speak.
Pictures and sound clips to follow......
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www.bmvs-camperhire.co.uk
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GT4
Nordschleife
Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire
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| Posted: Wed May 25, 2011 10:15 pm Post subject:
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May I ask where the name "Gundo" originated from.
I presume a US site?
Could be worse, could be Gozer the Gozerian.
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thoob
Silverstone
Joined: 13 Sep 2009
Posts: 139
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| Posted: Wed May 25, 2011 10:32 pm Post subject:
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| GT4 wrote: |
I presume a US site?
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Thats where I heard it, 6speed or rennlist.
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997.2 S pdk
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GT4
Nordschleife
Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire
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| Posted: Wed May 25, 2011 11:20 pm Post subject:
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Ghost Busters!
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jfb1977
Monza
Joined: 12 Mar 2009
Posts: 247
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| Posted: Thu May 26, 2011 7:56 am Post subject:
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Yeah, Gundo was the fourm member that first posted details and photos of how to do (what was previously called) the PSE hack.
Not sure which forum though... 
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2005 C2S Manual with aerokit. (Play thing).
2000 BMW 728i. (Work bus).
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GT4
Nordschleife
Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire
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| Posted: Thu May 26, 2011 10:34 am Post subject:
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Not Leland Pate or Darin Fister then?
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ABZ911
Spa-Francorchamps
Joined: 04 Nov 2010
Posts: 253
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| Posted: Thu May 26, 2011 10:34 am Post subject:
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This-thread-is-useless-without-someone-explaining-what-a-Gundo-hack-is-or-providing-a-link-smilie.
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Ian_UK1
Monza
Joined: 23 Jan 2010
Posts: 152
Location: Manchester, UK
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| Posted: Thu May 26, 2011 10:47 am Post subject:
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Go to 6speed and seach Gundo hack.....
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Current Porsches: 2010 997S Gen-II PDK, 2011 987.2 Boxster 2.9
Previous Porsches: 1999 996 C4 3.4 / 2002 996 C2 3.6 / 2005 997 C2S
Other Current Cars: 1985 BMW 635CSi, VW Golf GTi Mk5
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Oli.
Trainee
Joined: 06 Aug 2010
Posts: 96
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antonio
Spa-Francorchamps
Joined: 01 Sep 2009
Posts: 348
2005 Porsche 997 Carrera 2S
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| Posted: Thu May 26, 2011 1:20 pm Post subject:
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Had this done on mine, you wont regret it. 
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martin.997.C4S
Spa-Francorchamps
Joined: 20 May 2011
Posts: 302
Location: Croydon, Surrey
2012 Porsche Cayman 987
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| Posted: Thu May 26, 2011 1:20 pm Post subject:
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Love to hear some soundtracks of this or see videos 
Good luck, Cheers
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Oli.
Trainee
Joined: 06 Aug 2010
Posts: 96
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| Posted: Thu May 26, 2011 2:46 pm Post subject:
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| antonio wrote: | | Had this done on mine, you wont regret it. |
Do you know what size pipe you had put it? Have you anysound clips? I am having 1" 1/4 which has been recommended by two fabricators that do this mod
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www.bmvs-camperhire.co.uk
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ABZ911
Spa-Francorchamps
Joined: 04 Nov 2010
Posts: 253
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| Posted: Thu May 26, 2011 3:29 pm Post subject:
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So the Gundo hack is exactly the same as the Oettle hack for a 996, but for a 997?
I'm off to start a thread for the 998/991 ABZ hack! 
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GT4
Nordschleife
Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire
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| Posted: Thu May 26, 2011 3:33 pm Post subject:
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Or go to 911uk.com and search Oettle or FisterD.....
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antonio
Spa-Francorchamps
Joined: 01 Sep 2009
Posts: 348
2005 Porsche 997 Carrera 2S
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| Posted: Thu May 26, 2011 6:25 pm Post subject:
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| Oli. wrote: | | antonio wrote: | | Had this done on mine, you wont regret it. |
Do you know what size pipe you had put it? Have you anysound clips? I am having 1" 1/4 which has been recommended by two fabricators that do this mod |
Hi, thats the exact same that i had done and its sounds pretty good, no sound clips though, sorry.
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Oli.
Trainee
Joined: 06 Aug 2010
Posts: 96
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| Posted: Fri May 27, 2011 2:44 pm Post subject:
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Exhaust mod done;
Just need to fit it......
_________________
www.bmvs-camperhire.co.uk
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GT4
Nordschleife
Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire
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| Posted: Fri May 27, 2011 2:52 pm Post subject:
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They are going to be LOUD!
Looks familar:
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Oli.
Trainee
Joined: 06 Aug 2010
Posts: 96
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| Posted: Fri May 27, 2011 9:13 pm Post subject:
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Can't wait. Should be fitted by tomorrow lunch.
Have I got to take the rear bumper off to fit the boxes?.
_________________
www.bmvs-camperhire.co.uk
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GT4
Nordschleife
Joined: 08 Nov 2008
Posts: 30178
Location: Hertfordshire and Hampshire
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| Posted: Fri May 27, 2011 9:15 pm Post subject:
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No.
Ideally use a lift, else some decent axles stands.
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![Porsche 911 [991]](./images/models/998.png)
![Porsche 911 [997]](./images/models/Model-997.gif)
![Porsche 911 [GT]](./images/models/Model-GT.png)
![Porsche 911 [996]](./images/models/Model-996.gif)
![Porsche 911 [993]](./images/models/Model-993.gif)
![Porsche 911 [RS]](./images/models/Model-RS.gif)
![Porsche 911 [964]](./images/models/Model-964.gif)
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