I noticed a vibration from the passenger side door when I listen to certain music and I just installed a Tomei expreme exhaust and when I'm in 6th gear and I accelerate the vibration is much louder, I was wondering if anyone has experienced this issue and if anyone has a fix for this. May have to put some hush mat in to quiet it down if Mitsubishi isn't able to do anything.

Let me know if anyone has any ideas on how to resolve this.

Thanks!

 

Yea either some dynomat stuff or felt tape between the panels is the only thing that really works.. Besides hitting the spot until it stops.

I've had stuff like this in every Mitsu I've owned. My 02 lancer, 05 VIII, and the X

 

I suggest you remove the door entirely to get rid of the vibration noise. I guarantee it will solve your problem. I do want to note, you may encounter some increased wind noise with this solution, but fortunately, no more vibration.