Copper gaskets are notorious for leaking if not properly torqued down and even then there can be problems. Reuse your stock gaskets, I did, my lts are sealed with the STOCK 180k gaskets with no leaks and they have been off atelast half a dozen times

 

use the stock gaskets

 

X2

 

I picked up a set of fel-pro's when I put my pacesetters in... they have worked perfectly.. I have also put in headers with the stockers and worked fine... either way, you'll be good.

 

if you dont want to use the copper gaskets you can use your stock gaskets but if you want to get some ne one's the GM gaskets for a 2000 Vette work great too.

 

i used the copper ones and mine seems to be working fine.

 

I was wondering what gaskets to use for my pacesetters when I get em, but from reading your guys posts it sounds like it doesn't matter.

 

Do you have any photos of the inside of the collector where the primaries come together? Last set I saw looked like they dropped the MIG in there and just let it weld whatever it touched.