what should i do with a 94 corvette to make speed?

[vettehunter]

i have a fully stock c4 1994 corvette. i want this car to be beastly, without changing out the whole engine. so where should i begin and why? should i get catback exhausts?i want the most power and sound! prices doesnt matter.
but i would pick out performance over sound., is this a good exhaust?http://www.lmperformance.com/7128/24.html