just get the 2.5" 2-bolt flange gasket if you have a stock or 2.5" catback, or 3" if you have a 3" catback.

 

You NEED to use a tapered donut gasket as the surface of both flanges warp from the heat. A flat, thick gasket might work, 2 gaskets might work, 1 might work, putty/sealant will work for about 15 minutes. In the end, it's just a race against time.

 

so are you saying the remflex won't work

 

Yes they work .... They have the correct gasket you need. Trust me I bought one when I had my ZZP downpipe, and it fixed the leak.

 

Not for the 2-bolt downpipe to catback connection flange. Also, his downpipe is brand new. I highly doubt the flange warped.

 

I don't have one of those anymore, lol.

Use a remflex for the dp-catback, because that will warp and leak over time. That section gets pretty hot.

 

ok for sure. should i change the dp to header gasket

 

I have always used the GM Gasket for that, and it has worked great.

 

ok sweet thanks guys