View Full Version : Custom Exhaust Gaskets

10-09-2009, 10:55 PM
If you have made them, what material do you use and where have you gotten it? I tried using the Mr. Gasket material but it didn't hold up for too long. I'd like to find something more like a woven metallic material.

10-10-2009, 02:37 AM
There is a sheet that they sell at autozone that is supposed to be for exhaust. Its like 2ft by 1ft sheet that cost around $17. It has a metal weave in between some sort of material and can be cut with scissors. Ive used it with sucess. I would use it for gaskets for the catback but I wouldnt use it for the manifold.

12-11-2009, 04:32 PM
For the record, Percy's XX Carbon Gasket, can be had from Summit in a variety of forms.
Review- AMAZING. Never seen gasket material like this, but it is definitely the best thing on the market. Recommended above all others.

01-16-2010, 09:10 PM
Well, after 1600 or so miles the verdict is in- better than any other material on the market made specifically for custom exhaust gasket material, but... it still failed. I guess I'm resigned to making a new gasket every 1500 miles.

01-17-2010, 06:53 AM
Try copper.

01-17-2010, 10:58 AM
Stock toyota???

01-18-2010, 11:41 AM
I had gasket issues awhile back. I got ahold of my dads business' mcmaster carr catalog. And got a $50 sheet of extreme temp copper. The stuff is soft and maluable. I made about 4 gaskets on the mill and not one of them failed. After so long heat exposure will cause them to warp, but they still seal good due to their softness. If you can get ahold of a sheet and have a mill, they are definitely amazing gaskets.

01-18-2010, 01:18 PM
How thick was the copper from mcmaster carr?

01-19-2010, 12:08 AM
It was .050 i believe, it was a 12x12 sheet i think but it was worth every penny

01-19-2010, 02:12 AM
I guess depending on which gasket you are making this for you could call around to recycling places to see if they have any copper sheets that might work for you. Might be cheaper.

Edit: I was just curious looked up the melting point of copper and it is 1984.32*F. So I don't know if the run of the mill copper is lower then this becuse of impuritys.

01-19-2010, 02:53 AM
Cannon, why are you going through so many gaskets so often? Ive never seen anyone chew through them like that.

You ever thought of making a thin metal spacer, than using 2 gaskets together?

01-19-2010, 03:09 AM
Um... I use Toyota... Yes, even w/ the shiny HKS headers. I just found a couple that fit, spray glued them to hold long enough for me to put the two flanges together.

01-20-2010, 12:19 PM
I'm not sure why I'm eating through them so fast, but it's not too uncommon with custom exhaust parts, more common in muscle car circles. I would use the stock 3sge ring gaskets but I can't find them anywhere, and I can't find anything that closely matches them. The stock 3sge gaskets are to little rings that into recesses at the end of the header, may be a reason Toyota didn't use a flat sheet style gasket...

01-20-2010, 02:39 PM
I made 'em back when I had my 426 Hemi with headers - I used actual asbestos sheet material - which maybe you couldn't get these days but worked great for me.

01-20-2010, 03:18 PM
I would use

and some of those exhaust gasket sheets that they have at the automotive store, I put the RTV on between each sheet and on the flanges. So far so good :bigthumbu