Here's a loud exhaust built for an 84 Euro.
Headers, bullet mufflers (don't do much muffling), Flowmaster short Y adapter, Spintec (little muffling going on there, either). Big dia. 3 or 3 1/4.
(Instead, you could forget the special headers, and buy a Y pipe to mate to existing 84 cast iron manifolds, then cat...etc.)
