Im sure this has been asked before, but could use some info anyway.
I have 1985 Z28 5.0 305Ci auto i want to remove emission equipment and replace exhaust system completely. ive got a good idea of what needs to be done but would like to hear from anybody who has done this before to point me in the right direction. Cheers

 

Um theres the cat which you can remove and replace with pipe or just gut. Theres the evap canister on the front drivers side corner of ur car it looks round. Theres the AIR stuff on ur exaust manifolds. Theres ur smog pump which is on ur serpentine system mine was right under my air conditioning pulley. I think im missing something but thats all I can think of. ENJOY

 

Just buy non AIR headers and remove the smog (AIR) pump. Running a cat would be up to you but I would run one. Today's high flow cats do not rob performance on anything less than an all out drag monster. It is irresponsible (and illegal) to run without one since they can be had for so cheap. Fabbing up a pipe from your cat-back to your y-pipe could possible cost more than just buying a 3" slip fit cat off of ebay.

 

There are several things to remove. You can check your chiltons or haynes manual for stuff someone didnt mention. I removed all of mine from my 85. You will probably have to burn a chip for the car as removing emissions will probably cause idling issues etc.