I'd definitely go with a high flow exhaust. It'll help the turbo spool and give a good boost in power. As far as gauges, you should have the essentials. Boost, egt, a/f. With a stage one you dont really need a boost controller, but it would be nice. Turbo timer is another good item. If you really wanted, you could get larger injectors and a S-AFC, then lean it out so you dont have to push so much fuel through your injectors. Anyhow, happy boosting =o)

91 awd: 60-1, 880's, E-Prom, etc.
93 awd: JDM 6 bolt, K&N, full exhaust, Wally 255, otherwise stock.

R.I.P. the original "Factory Freak"
15.5's with short ram and catback only
1996 RS 5-speed