The O/R X-pipe will net a nice gain (14-16 RWHP), the driveshaft might be worth a coupe and I don't think the catback would add much of anything.
The 93R tune would probably add some over your current 91R tune since they would be able to run more timing in the car.
The 93R tune would probably add some over your current 91R tune since they would be able to run more timing in the car.