No disrespect to people that sell tubi, but you have to wonder why any 997tt owner would purchase an exhaust other than EP after researching/reading the threads on this bb. Cost is the only possible reason. I'm always surprised by people that buy other systems and then complain, in light of the unanimously glowing reviews of EP, whether lack of CELs, sound, quality, service, etc. I'm glad listened to what I read here before.

 

Love my Tubi on my 997.2. close to stock on idle and when cruising but under load it sounds amazing...... Great job from Tubi.

 

Have EP on my car with Techart tips

I never get tired of the look, the sound, or the performance.

 

Maybe you have bad gas?
Sorry, couldn't resist.
I have heard some Tubi's that sound a bit weird upon acceleration, but I guess I would not describe it as farts.
As others have mentioned, maybe you need to check it really good for connections to see if there is not something that needs to be tighten.
I had a Tubi, then went Fabspeed, then straight pipes - much better.