I just installed a Magnaflow Magnapacks catback system to my car. The problem is that it's making a buzzing noise coming from underneath the car between 1800-2100 rpm. It's kinda loud and makes the inside sound like complete crap. I don't think I can hear it from outside but definitely from the inside. I tried trouble shooting the problem but the catback is not banging against anything nor is hangers. Any ideas or similar problems with this catback?

 

make sure all the clamp bolts are tighten all the way... i had this same prob. the other week and for me it was the passenger side exhaust tip hanger... that allen wrench screw came loose and it was causing it to buzz really loud... just tightened and it's as good as perfect now! good luck

 

My magnaflow system did the same thing for a while, i just kept tightening the hex keys on the tail pipes, when i did that it totally killed my buzz lol

 

im thinking about going to get those damn hangers tac welded on and take out those hex screws... they are fudgein annoying!!!

 

IFF everything is tight and no rubbing of any sort, its the metallic resonance, good luck finding a way to cure that nature of physics...

 

yea same with mine you gotta tighten the **** outta it til it seems like it will break and then it doesnt lol, my prob is the tip clamp wont tighten anymore it streched so i need a new one!

 

yeah mine too... the tip clamp would not tighten enough so it would stay and i used everything i had in me... so i just took it to the local shop and my work sends them a lot of business so they hooked me up with 4 tac welds just so they wont fall off when im driving down the road...

 

my tail pipes slid on the pipe.. I never could get the clamp on the tips to stay tight so I bought two extra clamps and put on them.

No buzzing noise from mine though.. maybe its touching control arms or the car somewhere...

here is mine:

http://youtube.com/watch?v=jt6ak83KI_o

 

sounds like the exhaust tips, make sure they are TIGHT i had a hanger fall out and need to get another fabricated to replace it!!!! also there was a time my tops came loose and started to rattle during certain rpm ranges.

 

Have this same thing on my MAC...and yeah right at the same RPM as you, about 2K. I tightened the clamps holding my tips on really really tight. So where are these hex screws people are referring to? They attach the hangers to the car or what?