Stopping Vibration

[Justin M]

I installed a 3 inch DP on my truck awhile back. Well i did not get my firewall bent back, and it is vibrating against the firewall and driving me nuts.

What can i do to stop this. The DP will not come off. Is there a heat resistant sound deadning material i can by and stuff it in between to stop this.

[97Beast]

I dont know of anything that'd work, but I'd look for some sort of foamish heat shield.
But I doubt that will work...I think you might have to pull the DP off.
The best thing would to take off the pipe, cut the seam in a few places, then beat it back. I used a sawzall and an air-chizel. I ended up cut off that whole seam, and I havent had it rub yet.

[Justin M]

if i can find some sorta heat sheild, i would wrap the DP with it

[Justin M]

bump!!!!!!!!!!!!

[95 Powerstroker]

you can buy header wrap that might work

[Gruss]

header wrap will cause the dp to rust faster. Need to make room for the pipe.

[Justin M]

dang it....i had that feeling

[Stinkers]

I had the same problem......you might be able to rotate the DP forward to move it away from the firewall, and then slide the lower half of the DP down a little to get the length back. The problem with this is that it can only go so far until it hits the up-pipe to the turbo, which you don't want either. Also, the angle of the DP with respect to the rest of the exhaust can be a problem. So if you haven't already, it might be worth it to try to tweak the installation, but most likely it will probably be easier and faster to just take it off and bend the firewall seam. Good luck!