Ordered a stock decatted H/P for my 11, which gaskets should I use when I replace them?

 

The stock gaskets work fine, no reason for anything else.

 

If youve never had the header off you can reuse the stock ones. When I put the VHDDs on I used oem gaskets and they worked fine. You need to tap them in gently or they will squish, even if you freeze em like its been suggested.

 

Freezing helps out. Just be careful not to deform them