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Hey guys....Latley its been raining and I have been heering some aufull sounds coming from my greddy evo. It sounds like there is water in the cat piping and it just starts rummbling like crazy and it getts really really loud. You can feel the cat start to rumble. It only happens when it rains heavily and it goes on and off.

WTF is wrong

Thanks guys

 
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im not too sure but u prolly have a leak in ur piping

 
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its an old problem with these cars with modded exhausts and rain. What you hear is the metal contracting and expanding as the water hits the pipe.

 
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Yup, my car does that as well.. Annoying and loud as ****, but normal.

 
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its actually the B-pipe of your exhaust expanding with the heat and cooling rapidly with the direct splash of water. When that happens it vibrates against the frame of the car. Not that much of a concern just gotta watch out for larger puddles....this was kinda explained in a prior post.

 
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use the search button next time, also put this is the right forum next time!

 
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it happens nothing major.