Performance Exhaust GT coupe 86 ?
 

any exhausts still available for the 86 GT coupe. Like nice large pipe and free flow if any around .

The best way to go and probably the cheapest/easiest is a custom build exhaust. The 5-3-1 manifold from the Audi 4000Q is desirable. From there, I would go 2.5" all the way back.

I have stock everything back to the cat. From there I removed the cat and replaced the resonator and muffler with Starla components. They used to make muffler components for Saab. The sound is very throaty and deep. It has a nice sound. FCPEuro carries them and so does Rockauto.