B8 S4 Branch resonator. 0% Drone

Deo

Registered User
Hi, So going through a bit of a mid life crisis I deleted the rear mufflers knowing it would cause terrible drone. (Have non resonated downpipes aswell). 1800 rpm, 30mph,70mph and under load it made me feel sick. Did a bit of research on j pipes and read about the calculation. Couldn't be bothered to do that, so bought two stainless 2" elbows and two extra baffled resonators got them welded to the rear sections and I can confirm I have 0% drone. I can't believe how well they have worked. I just wanted to share this because it's quite a cheap exhaust mod compared to a full exhaust systems out there.
 

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HertS3

Registered User
Hi, So going through a bit of a mid life crisis I deleted the rear mufflers knowing it would cause terrible drone. (Have non resonated downpipes aswell). 1800 rpm, 30mph,70mph and under load it made me feel sick. Did a bit of research on j pipes and read about the calculation. Couldn't be bothered to do that, so bought two stainless 2" elbows and two extra baffled resonators got them welded to the rear sections and I can confirm I have 0% drone. I can't believe how well they have worked. I just wanted to share this because it's quite a cheap exhaust mod compared to a full exhaust systems out there.
Hey Deo, interested in your post as I'd like to get a bit more noise out of the car without breaking the bank and don't want drone (had enough of that on my previous S3).
Where did you get your rear sections from and what was cost?
Thanks
 

Deo

Registered User
Hi mate, the rear sections were from Zaustworx £250, 2 resonators £80 and the stainless 2" elbows £26. Got someone to weld the resonators for £90. Hope this helps
 
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