i'm tryin to install a new tubular exhaust manifold on my S13 but i've never actually done it myself but i've seen people do it. so i was wonderin if there was anything tricky to the removal of old and install of new. or is it jus a mater of removing bolts and placing them back???

 

Unless the old manifold has been taken off recently, I'd suggest spraying WD-40 all over the bolts before hand and let it sit for a couple minutes. Replace the manifold-head gasket and the turbo-manifold gasket too.