Exhaust Gaskets

[donkeylips]

Anybody know where to get 2.5" exhaust gaskets cheap?
I bought some from STM last time and the size was perfect, but I need a bunch (for multiple cars) and I think they were $6.50 each.
I picked some up at an exhaust shop one time and they weren't quite right.
Are they specific to the aftermarket exhausts for our cars, or are they universal?
Does anybody use sealants instead of or with gaskets such as muffler cement?
Just trying to figure out cost-effective ways to do this, as I need to put these together, and some of them might be coming back apart in a few weeks.

 

[G]

Do not use any sealant. These are reusable >> click

 

[donkeylips]

The Vibrant 2-bolt gaskets are what STM sells, and what I used.
They really don't seem to be reusable...I had 2 that were 2 weeks old, I took the exhaust apart and reused them. Now it's leaking like crazy at both flanges.

 

[G]

You did not specify 2 or 3 bolt in your post.

 

[donkeylips]

You're right - I thought I had.
It's for a mostly stock setup. 2g O2 housing, with a standard 1g awd 2.5" turbo-back exhaust modified to fit a gvr4.
I still don't think they're reusable.

 

[strokin4dr]

Summit racing has them for a good price.

 

[donkeylips]

Ok so I got them from Summit. Spent $60 (I needed 12).
Another question:
Is the catalytic converter section / test pipe specific to DSMs/GVR4s? Or is it somewhat universal?
Does anyone sell a resonator I can bolt up in place of a cat?