What could happen?

ruskov

New member
i reallyyy want to install my test pipe on my a4 b6.but before doing that i would like to know the risks.If they stop me what can happen?( I will keep my catalytic)
 
As tu un pré-Cat dans le downpipe? Si oui, tu as encore un cat.

Moi j'ai un test pipe depuis toujours, exhaust stock. Jamais eux de problème.
 
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