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Gundo hack and 200cell cats

Drew1209

Well-known member
Joined
31 Aug 2016
Messages
261
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
 
Can't answer on the cats but as you say the gundo sound is superb exactly how the car should sound.
 
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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