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Old 08-27-2013, 10:41 AM   #1
wesleykeithzimmer
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Mangaflow exhaust issues.

I installed a new Mangaflow exhaust on my car and whatever i do the exhaust keep leaking at the flange at the flex pipe , the cat back. I installed all different kinds of gaskets and even doubled up gaskets but that doesnt seem to be working . I dont want to take the car to a exhaust shop and spend more money on fixing the exhaust.


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Old 08-28-2013, 12:36 AM   #2
sandman503
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just have them weld it up cant be any more than $50
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Old 08-28-2013, 12:39 AM   #3
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Try using some exhaust paste. It seals it up but can still be broken if you ever need to take it apart. They sell it at autoparts stores.
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Old 08-28-2013, 12:48 AM   #4
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Same issue with mine.
But it's holding better this time round. I bought some bulk Fel-Pro exhaust gasket material and made my own gaskets. 2 on the header flange and 2 on the flexpipe/flex back flange. It's lasted 3 weeks now, v 1.5 week prior.

To me, and for what's on this car, I think it's an alignment issue. The flanges are slotted and that can allow a large gap/step between the piping. So then you have a gasket hanging in direct path of high heat.
There's no good reason they need to be slotted and it's a PITA to line them up perfectly.

In time I'm going to do away with bolt flanges and go V-band.
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Old 08-28-2013, 12:52 AM   #5
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the exhaust should be torques evenly to 35lbs at the flange, and use paste.
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