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Originally Posted by pruettfan
All of that looks pretty normal. As exhaust systems and turbos go through heat cycles they change color and that light surface rust is pretty much standard issue. I would ask Fabspeed to chime in but I don't think you have an issue there. Your car was very new when you had the downpipe added but what are your thoughts about the change in sound and performance versus the stock system this rattle problem aside? I am contemplating doing this with my otherwise stock M2.
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The sound after the install is amazing and it honestly wasn't too bad installing it. I put it on the same day as my break in appointment so I can't compare performance before and after too much.
Just need to figure out what's causing this ringing noise and if it's related or not