[seirogan]

Hi all,

I recently installed a M140i MPE axial back on my 330i. There is definitely a noticeable increase in decibels inside the car. However, I'm getting a lot of vibrations inside the cabin as well (seat and center console vibration, and sometimes the windows rattle). Just wondering if this is normal and what your experiences are like with installing a MPE on 330i.

The sound from outside is truly amazing though!

[njdangelo]

That doesn't sound normal, no. Did you have to do any modifications to make that fit on your car? If so the rattles are most likely in response to the them. An increase in tone is normal but there really shouldn't be any reason why your windows or center console would rattle, especially if you still have the stock downpipe and mid pipe in place.

[seirogan]

Originally Posted by njdangelo

That doesn't sound normal, no. Did you have to do any modifications to make that fit on your car? If so the rattles are most likely in response to the them. An increase in tone is normal but there really shouldn't be any reason why your windows or center console would rattle, especially if you still have the stock downpipe and mid pipe in place.

The inlet pipe lined up exactly. My muffler guy just welded the part on. The exhaust tips were extended by welding as well