Header Install Options

[94ST2]

Alright I recently got a OBX 4-2-1 header that was modified to fit the celica. My question is how hard would the instalation be? When I unbolt the old header and downpipe im pretty sure I can use the same bolts for the new one. Also what kind and how many gaskets would I need. Three most likely right? One for where the header bolts up another for where the header bolts to the downpipe and another for where the downpipe bolts to the cat. Any other useful information that would make the installation easier would be helpful.

[CheesyLobster]

Alright I recently got a OBX 4-2-1 header that was modified to fit the celica.  My question is how hard would the instalation be? When I unbolt the old header and downpipe im pretty sure I can use the same bolts for the new one.  Also what kind and how many gaskets would I need.  Three most likely right?  One for where the header bolts up another for where the header bolts to the downpipe and another for where the downpipe bolts to the cat.  Any other useful information that would make the installation easier would be helpful.
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bring it to an exhaust shop and they will do everything for you. If you want to put it in yourself though, you will need the exhaust manifold gasket, and should probably cut right before the cat and keep that gasket untouched, then weld from that cut and have a flange on the other end for the header; then you'd need a gasket for that flange.