2008 350z. This is probably a stupid question and I’m sure I’ll get flamed. I just received my Motordyne ART pipes. They came with o-ring crush gaskets to install between the headers and the pipes. Should I use these in addition to some 3 bolt gaskets, or is the o-ring sufficient enough? Thanks in advance for your help.

 

i used both, just because i could. i decided to trim the triangle gaskets inner circle so that the crush gasket fit inside it

 

Thanks for the input!

 

Need to use the crush washers or else your bolts will rattle off. I missed a side when doing Z1 test pipes on my z, and learned that the hard way lol