Who has removed the resonator on their '09 Factory JCW? Is there a noticeable change in performance, and if so, what changes did you notice? How drastic did the removal of the resonator effect exhaust sound? Has the removal caused codes to be thrown? I'm considering removal of mine if the performance improves but having experienced the constant drone of a MaganaFlow exhaust on my previous R53, I want to keep any increase to the noise level minimal.
I doubt you're going to see much of a performance gain. As far as throwing a CEL goes, there's no sensors down that area. The sensors are just on the lower part of the downpipe so you'd be fine with that. I have no idea what it would sound like. If you do it, be sure to record a before and after version
I think its all sound. If you look through the Factory JCW exhaust that resonator is 100% pass through... there are just gaps on the edges for exhaust to go. Mine was cut in half for shipping and I took a look
I installed the NM Charge Tube which also removes the resonator. Nothing but improvement for performance and sound...all good.
Thanks Greylens. I was referring to the exhaust resonator in-line before the muffler. I have looked at the NM charge tube though and it is on my list of future mods. Any additional opinions on the resonator...anyone?