any thoughts on the halltech stinger cold air intake for 98 c5

 

That's an excellent intake (the same one I have.) and if you really want to get the best use out of it, either open up your fog light panels (coupe or vert C5s) or do what I did. My cold air modification procedure, along with other tips and tricks are located here:
http://www.conceptualpolymer.com/corvette_c5_corner.htm

Dave