http://www.measeperformance.com Keith started making 3" dps for hot airs.
ATR has 2.5 up an downpipes, Postons makes good hot air headers, I'm sure they've got more, havent checked their catalog. I'm sure I forgot some other vendors. Theres stuff around, just gotta look for it.
You know the online catalogs their is almost no 84-85 parts, I probably will have to call them. Their catalog is sometimes lame.even i don't show everything on the net.
Yeah, ya just gotta look around for the stuff. Get the actual cataloges, ATR's has about 1/2 a page of hot air exhaust parts. I found out about all the different stuff just by reading peoples' profiles an junk.