Hey, i have a of headers that i just installed on a truck. On the passenger side the header is pretty close to the firewall and also to the transmisson bellhousing. When driving, you can hear the header vibrating agianst something. (I am assuming it is hitting the firewall or the firewall) Its annoying as hell. Im sure there is other people that have this problem, what can i do?

First I would locate the point of contact, have a friend run it while you look under the hood, triple check that every thing is tight then once it is located there are a variety of potential fixes but first you need to know the point of origin.  Good Luck  

Ah it will be fine once you find out what its hitting, or maybe you dropped a socket inside the header. but shoot, aren't headers supposed to hit stuff. my passenger side is melting the a/c box and the drivers side is rubbing the steering box, but it can go for awhile cant it?  

Not missing any sockets,,,

 I checked the header bolts and everything is tight. The thing is that it really dosent rattle unless you are driving the vehicle. I am assuming it is hitting the fire wall and the trans bellhousing because they are the only things that are even close to the header tubes, and you can see scratch marks on them now that i have put 200 miles on it or so. I thought about stuffing a peice of header wrap tape at the two points, to dull the noise. Or making a mount to hold the exhaust pipe sturdier right beside the reducer.

Or i could install a louder stereo system, and kill two birds with one stone... :-)

Thanks 

Make sure that our headers are sealed properly. Just because they are tight, doesn't mean they are leak free. Mine did the same thing, and for a while it drove me crazy. I thought it might have been a colapsed lifter, but it was an exhaust leak at the flange. Mr. Gasket makes some nice copper gaskets and i have found that they work pretty well.

also put some High temp silicone on the gasket and the sealing surfaces of the flange and the heads. Make sure its high temp though because if not then you will have big problems

Do they make silicone that high temp?

It is probably hitting the firewall.  You're gonna have to drop that header and do some 6lb hand sledge "massaging".

Damn straight. It's sold at Ace. Works for all kinds of stuff.

Hey, I apperciate the help. I put the gaskets that came from Hooker on, put only because that was what I had, hell, they werent even metal, they had a kind of cardboard texture to them. I think I'll get some of the copperseal Mr. Gasket ones, and put some of the silicone on them, it makes sense.

Thanks