In the next few months I will have upgraded my intake, header, cat converter, and exhaust. I am also looking at other ways to increase power from the engine. After looking at turbo's, it's just too much maintenance for me and I just want it all N/A.

Is it a reasonable goal for my car to try and reach 200hp with no turbo/supercharger and no engine swap?

 

Only way to make 200whp with ad serieswithout a turbocharger or supercharger would be nitrous, even if you rebuild it with cams/high comp pistons, itb's and everything you will probably be around 150whp n/a. The highest I have seen from an n/a D is 173 whp.