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Drew1209
Trainee


Joined: 31 Aug 2016
Posts: 85



PostPosted: Sat Nov 11, 2017 3:38 pm    Post subject: Gundo hack and 200cell cats Reply with quote

I’ve just done the gundo hack to my original back boxes today and I have to comment on how good the car actually sounds now, the sound off the flat 6 is amazing with a little more exhaust note.

I did originally have the cat bypass pipes fitted with the original back boxes but it was very raspy when revving so much so I took them back off.

With the boxes now hacked how would they take to a set of 200 cell cats, anyone got a similar exhaust set up I assume the decat pipes would still be OTT
 
  
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Locosaki
Monza


Joined: 03 Jul 2016
Posts: 186
Location: Fife


PostPosted: Sat Nov 11, 2017 10:19 pm    Post subject: Reply with quote

Can't answer on the cats but as you say the gundo sound is superb exactly how the car should sound.
_________________
Carrera 4 MY99 with full Hartech rebuild
 
  
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rob_p
Imola


Joined: 20 Oct 2013
Posts: 796
Location: Leicester


PostPosted: Sun Nov 12, 2017 8:26 pm    Post subject: Reply with quote

I have a 997 c2 and have the gundo hack - very happy.

I added 200 cell cats instead of the standard ones - I didn't like it. Too noisy, too much nvh, cabin resonance etc.

I stuck the OE cats back on and sold the 200 cell - much better again!

Proceed with care....
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997.1 C2 (full Hartech rebuild, Ohlins coilovers, ducktail, plus some other bits)
Jeep Grand Cherokee WK2
Ex Audi A8 V8 4.2tdi (best all round car I will ever own?)
Ex Porsche Boxster 986
Ex Mazda MX5 mk1
Plus some other stuff that wasn't very interesting....
 
  
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