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Bad Vibrations After LT's Installed?

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Old Aug 1, 2011 | 08:26 PM
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Default Bad Vibrations After LT's Installed?

well i got my original issue fixed (i was rushing and put the gasket in upside down that was a $200 mistake) but i figured out that i have flowtech LT's and ory. the ypipe bangs but thats an easy fix. but when im driving its perfectly fine but when im at a stoplight on the brakes i get a really bad vibration, and its only when i press on the brakes, in neutral its fine. could it be that the kmember is rubbing up against them causing it to vibrate? its to the point where it is vibrating everyhting in the cabin
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Old Aug 2, 2011 | 09:38 PM
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Check where the y-pipe connects to the I- pipe and see if it touches the tunnel brace , this was my problem and it vibrated the **** out of my car.
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Old Aug 2, 2011 | 09:47 PM
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Its the angle of the pipe at certain speeds or rpms. You have to go look under there to find out where it is hitting. Could be catback to ya know. Once you install an exhaust, most of the time there is adjusting to do afterward which always sucks.
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Old Aug 3, 2011 | 10:55 AM
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i know my ypipe bangs at certain rpms but ill ghetto fix that soon. the weird thing about it is it only vibrates when im on the brakes or when im in drive holding on the brakes at a stoplight. in neutral its fine and in park it is also
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Old Aug 3, 2011 | 11:22 AM
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Have you ever replaced motor mounts or trans mount? Just thinking maybe its possible engine or trans has more that normal play who knows.
Your gonna have to poke around and think about whats going on down there. Alot of us just leave the y pipe cross brace off because of this. Iv had mine off for 1 1/2 years.
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Old Aug 3, 2011 | 02:04 PM
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taking it off wont cause any problems? it seems like thats a long ways between exhaust hangers. i might try that
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Old Aug 3, 2011 | 02:10 PM
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Originally Posted by my bandit
taking it off wont cause any problems? it seems like thats a long ways between exhaust hangers. i might try that
Well I asked the same question as you probably 1 1/2 years ago and lots of guys have done it with no problems. So I did it and its been great. No issues and nothing has moved at all under there.
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Old Aug 3, 2011 | 02:47 PM
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was your exhaust welded? ive got the lm1 and only have it clamped to switch out the resonator. it shouldnt be a big difference
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Old Aug 3, 2011 | 11:10 PM
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Actually yea it is but just the I pipe to merge collector. I wish it wasnt cause I need to take it all apart!
I wouldnt let that scare you. Do a search and see how many run their y pipes without a cross brace. Just make sure its clamped the best you can do
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Old Aug 3, 2011 | 11:17 PM
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Mine is off and exhaust is all held together with band clamps. I get vibrations but it's more so the solid mm I have lol it will be fine without the crossmember though
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