My brother is looking to buy a '98 C5 for around $19.5K. It has around 55K miles on the clock. Before he takes the plunge, is there anything else he should be aware of for that model year? What are the good, informative vette forums to browse? Exhaust systems that stand out? I think he's leaning towards Borla, but he mentioned that there are like 5-6 different types for the car. Finally, he'd probably be looking to add a procharger down the road as well. Any suggestions/input/advice would be appreciated.