well the subject speaks for itself... its been doing it since i got the car almost 2 years now.. doesn't really bother me, not really loud or anything, just curious as to what it is... thanks Corey

 

It is just the metal expanding and contracting due to the sudden change in temp.

 

geat some headers and the noise will go away.

 

i knew it wasn't anything to serious.. thanks

 

It's actually the catalytic converter cooling down. The converter has to be very hot during operation to work properly; so it actually ends up being hotter than the rest of the system and as mentioned above, the metal is contracting as it's cooling down. The only way to get rid of it is to remove your catalytic converter.

 

...thats good to know although i should have been told this a few days ago because i burned my forarm on a cat when i was changing its oil on some hyudai or whatever at work.....it isnt too pretty

 

now i know to always keep your sleeves rolled DOWN when going near the exaust of any car thats been on te road for a while, and to refer to the topic, yeah every car, new, or old will make that noise depending on if its humid, cold, and whatnot...just dont touch it like i did accidentaly :lala:

 

Its not the catalytic converter, I dont have one

 

You're right - its not the converter. It's the flanges and flange bolts on the exhaust. And ALL cars do it BTW - some more than others.

 

Funny - Since I've never heard a cat-less car make the same pinging sounds as the ones with them. Honestly. And trust me, I've been exposed to many muscle cars and street rods that do not have catalytic converters. I'd have to hear it to believe it.....

 

yeah i dont have a cat... thats y i thought that the headers and new exhaust got rid of that problem....but the cat theory makes sence

 

I've never listened to any other cat-less cars cool down before - at least not to listen for any noise. But my car currently has just a straight pipe, and it still does it. It depends on how hot the exhaust piping gets - and a cat really boosts the temps

 

The cat helps things along with the added heat. Also, running header wrap can add some exhaust heat to the pipes. If you run a fully welded system, you probably won't have much if any noise at all.

 

my set up is all clamped togeather. headers and a catback....no noise... i think that its just anything stock.