What you guys do with stock headers and exhaust after swap?
 

With your stock header and exhaust when you swap them since they are brand new. sell it? if yes to who?

Typically with that kind of thing I just shove it somewhere in storage incase I ever need it for some reason. I already have way too much stock of old parts Ill likely never use again.

Same, I'll store them. I still need to sell my stock Si parts.. D:

I'd never sell OEM parts. I'll sell something aftermarket if I replace it with something else aftermarket but it's a guarantee that a time will come after selling your stock parts that you'll wish you hadn't.

I put everything that I had removed from my Jeep back on it before trading it in.

I add it to the large pile of stock rims, exhausts, engines, transmissions, interior parts, and that crap shoved in the corner of my parents barn.

I try to sell to help offset the cost of the aftermarket part and because I have limited space.

Same with me, I tend to keep all OEM parts, its always better to have them around. for me anyways