Help with leaking Magnaflow X-pipe

[OPENRUP]

Just installed a Magnaflow catted X-pipe on my 2003 Cobra. I used a new OEM gasket on the passenger upper manifold connection. Started it up and drove and it's leaking on that passenger side. Outside of RTV is there any tricks to getting this to fit tight?

 

[hotcobra03]

i hate gaskets.

maybe loosen the other side and tighten passenger 1st.

i recall with mine when i switched,the x pipe needed a little help with rubber mallet