Hi,
I recently traded in my 86 after having installed a custom exhaust when I first got it. I put on the exhaust when the car had roughly ~16,000 miles. Up until that point it had the stock exhaust.
I have the stock exhaust wrapped in plastic under my bed and really have no need for it since I no longer have an 86. If you'd like to have it for free, you can pick it up in DTLA!
Otherwise, let me know if you have suggestions for how I should get rid of it...