Q for Gundo Hacksters
#1
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Thinking abt doing the hack on my 2005 C2 with 1 1/2" pipe, not too aggressive but a little more sportier sound. I'm wondering if there is a problem with heat buildup considering it seems that the hack pipe would shoot hot cat exhaust directly at a small area on the side of the OE 'out' pipe it is welded to. Experiences/advice welcome. Thanks
#2
Drifting
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Go with the 2" pipe. I would hardly call it too aggressive and its a deeper sound. Regardless, assuming they use SS I cant imagine there would ever be any problem. At least never seen any issues on mine
But be careful, its not a full PSE sytem. so not Porsche approved so be prepared for the condescending comments.......
But be careful, its not a full PSE sytem. so not Porsche approved so be prepared for the condescending comments.......
#4
Not in MA anymore
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did my '06 in '07 with 2" pipe and have been extremely happy! Not too loud nor too quiet and NO interior droaning. Check here ->
#5
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I did the 1 1/2" pipe and am VERY happy with it. A friend on my recommendation did this mod also and thought that the sound was not loud enough for him. We all have a different ear for sound so you might want to listen to examples before you jump. Reason I did the 1 1/2" mod was that if I did not like it, I could always enlarge it to the 2" pipe. Whatever you do, be sure they use STAINLESS STEEL by-pass piping.
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#8
Instructor
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I went with a 2" pipe. My only complaint is that I waited so long to have this mod done. Great sound ( I also have the AWE crossover pipes which eliminate the '09+ center muffler) and absolutely no interior drone. The mod adds a lot of "body" to the exhaust tone and is evident thoughtout the entire RPM range. This is how the 911 should sound like from the factory.
#9
Rennlist Member
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Can someone explain the difference between the FD Motorsports mufflers and the Gundo Hack. Looks like the concept is the same but the quality of the Fister product with the added pipe looks top notch.
http://www.fdmotorsports.net/index_files/Page732.htm
http://www.fdmotorsports.net/index_files/Page732.htm
#10
Instructor
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Can someone explain the difference between the FD Motorsports mufflers and the Gundo Hack. Looks like the concept is the same but the quality of the Fister product with the added pipe looks top notch.
http://www.fdmotorsports.net/index_files/Page732.htm
http://www.fdmotorsports.net/index_files/Page732.htm
Fister products are top notch, to be sure. However I got my GH done much cheaper and definitely saved time doing it locally vice mailing in core mufflers to Fister and waiting for their modified mufflers to finally arrive back home. The muffler shop I went to even shaped the ends of connector pipe on a grinder to fit the curve of the inlet/outlet pipes on the muffler. The welding was clean and solid.
#12
#13
Instructor
#14
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Sound is far too personal a thing to make what I think even close to credible. ![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
It is way more than just volume, it's timbre, rumble, burble, tone....
With this mod you are essentially bypassing the mufflers for a certain percentage of exhaust gas.
This is not what the Sport Exhaust does. (It always passes gas through the muffler)
My personal feeling and no one jump all over me for it... is that it's a bit too harsh. Like you would expect an open exhaust to sound (but not as loud).
![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
It is way more than just volume, it's timbre, rumble, burble, tone....
With this mod you are essentially bypassing the mufflers for a certain percentage of exhaust gas.
This is not what the Sport Exhaust does. (It always passes gas through the muffler)
My personal feeling and no one jump all over me for it... is that it's a bit too harsh. Like you would expect an open exhaust to sound (but not as loud).
#15
Instructor
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As I previously stated in an earlier post, I have the AWE crossover pipes installed which you would think would add a significant amount of volume to the exhaust sound. By themselves the crossover pipes did very little to the exhaust note, and was only noticeable on initial take-off (which tells me the center muffler on '09+ models doesn't do much muffling). Combined with the hack, I have, IMHO, the sport (sounding) exhaust note I was looking for. Other 911 owners have ridden in my car and have commented very postively on the sound. Not saying there isn't one out there, but I have yet to read about someone who did the hack that wasn't happy with the results.