[Porsche944]

The bellows is there to allow the 1-4 header to expand and contract, so some "wiggle" is OK.

Exhaust gaskets go with the metal side towards the header flanges.

For the exhaust hardware I do a "2 Step" torque by hand.

Once I get ALL of the hardware installed, I snug every thing up and then I start the engine. I let the plumbing heat up enough to cause some expansion, and then I shut the engine down. I do a final "torque" while the plumbing is still hot.