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      08-22-2013, 01:56 PM   #46
greentrbo95gst
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Drives: 21 M5 Comp
Join Date: Jan 2011
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Quote:
Originally Posted by AMS ALPHA View Post
Alpine to be clear what you stated earlier is not the issue. The issue we are seeing is with the donut gasket but not as you have it shown. The picture you have shown has your gasket installed incorrectly. Your tech installed the gasket on the pipe before installing the pipe in the car. This caused that metal isolator gasket to float around and rattle. The donut gasket should go on after the install on the back side of the pipe just like from the factory so as to secure it in the downpipe carrier brace. We install the donut gasket the same as the factory. This is why we did not have an instruction sheet for this pieces as it installs the same as the stock downpipe does. Regardless we will get some instructions made up here in the very near future.

What we are seeing on this car is that even with the donut gasket installed correctly there is a rattle. This is stemming from the fact that on some cars as they are assembled from the factory the donut gasket is crushed in a way that when you attempt to reinstall it the donut no longer sits flush against that metal vibration isolator gasket. This also causes that metal gasket to then rattle around.

So the same item is causing the noise in both cars but the reasons are a little different. Yours stems from an improper install while Hunter's stems from a bad donut gasket. We have new gaskets on order that we are installing in Hunter's car that we feel should fix the issue. If it does we are going to include new donut gaskets with the purchase of every downpipe set.

Sorry for the long post, I just wanted everyone to be clear on what we have found so far.

Eric
Can you post the part # for the gaskets?
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