Hi guys!
My first post to this forum!
I have this system fitted to my 230 fl estate and I'm having some problems with annoying boomy and bassy drone and resonances in low rpm (maybe 1500-3000rpm). It gets really bad when the exhaust gets properly hot on a long trip. You can hear it basically all the time, even on flat road but on a uphill or acceleration... .
On the outside the sound is very nice, but I was very surprised with the cabin noise. I'm still hoping that it's just because something is not right and I can get rid of it.
I have already added sound deadening to boot floor, sides (not wheel arches), boot lid and under the rear seats. Piping should not be touching anywhere (going to check this third time when I have chance to lift the car). If I remember, the y-section looked like it's a bit close to the heat shield on the spare wheel well, maybe it expands too close to it when hot. I even tried wrapping the exhaust to the fake tips to get the sound away from under the car (this made a minor difference). Saw the trick in some Kia Stinger forum as they have fake tips too.
And for the hanger, I got a hanger from my old Saab 9-3 lying around so it found itself a new home.
Do you guys have any tips or tricks to share?