I'm trying to do custom exhaust on my P5. Racing Beat's website states that the Cat-Converter is a power robber on our cars. Has anyone messed around with replacing the 2 cat's that come stock on our cars with one high flow cat. Im going to replace the O2 sensor behind the aftermarket cat. Does this sound like a good idea.
Opinions welcome on wether or not it will make a differenc e on power output.
Opinions welcome on wether or not it will make a differenc e on power output.
