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New catback, new banging noise

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Old Mar 9, 2013 | 11:16 AM
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Default New catback, new banging noise

I installed a Borla adjustable catback on my otherwise stock car, and now at idle, there is a rather annoying banging/vibrating noise coming from underneath the car. I've read of people having this issue at WOT, but this only happens to me at idle.. Anyone else have this issue or have any ideas?
TIA
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Old Mar 9, 2013 | 11:20 AM
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that happened to me with my corsa catback also, it was banging on the rear end, 3" pipe over the axle is a tight fit especially on lowered cars. mine drove me absolutely crazy so i took it off and fabbed up custom true duals lol
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Old Mar 9, 2013 | 11:58 AM
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Yeah..true duals seems to be the solution for most people..haha. I'm not lowered, but the over axle piece was tight. Guess I'll just have to wait til spring break in a couple weeks to take a look
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Old Mar 9, 2013 | 12:09 PM
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What size pipe did you get?
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Old Mar 9, 2013 | 12:39 PM
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It's a 3 inch
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Old Mar 9, 2013 | 12:42 PM
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Originally Posted by ZouMechE
It's a 3 inch
Make sure its not hitting the trans crossmember
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Old Mar 9, 2013 | 06:02 PM
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Thats the reason I was asking^ lol

Could be hitting since there is very little clearance.
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Old Mar 10, 2013 | 01:45 PM
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Mine was the tail pipe on the passenger side rubbing on a heat shield type thing:
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Old Mar 10, 2013 | 01:50 PM
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Im lowered with 3in over my 9inch rearend which has bigger axle tubes then the 10bolt and my magnaflow doesnt hit. I will be making a 3.5 I-pipe here soon over the rearend.
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Old Mar 11, 2013 | 11:00 AM
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Here is mine. I had the "ears" of the trans crossmember cut because it was touching my 3" pipes and causing a huge vibrating noise

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Old Mar 12, 2013 | 08:03 AM
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^ i had almost similiar issue with my custom Y pipe but i slightly bent them.
OP you might want to take a look under there and see where exactly is it hitting..it might just need some adjustments.
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