newbie, i need help
First off Welcome.
Next, your question covers alot of ground and you will get many opinions, here's mine having asked alot of what you are asking.
Exhaust, go to a Vette show, or local show of some kind and listen to them in person, your idea of too load and mine are completely different. Also, start by listening here
http://dodds.cc/chad/garage/z28/ls1_sounds/
http://www.madvet.com/shop?frame=2.36.6602
http://www.thx2.net/exhaust.htm
That should get you started with that.
As far as hearing your sterio put in all new speakers, head unit and amps if you want to get a load exhaust, thats not meant to be cross but I bought a Vette because of the exhaust sound. Again, you will get many different opinions on this. There are several forum members that have sweet systems in their Vette's.
Tire size. Again room for many opinions. I have decided on 305/35-18 in the rear and 275/40-17 in the front. Some members have gone bigger and some have different size rims than stock, many different ways to go, it is preference. Cost will play a factor also. Check this out, they are tire size calc's used to compare stock to what you are changing to.
http://www.1010tires.com/TireSizeCalculator.asp
http://www.miata.net/garage/tirecalc.html
What you should pay for a Vert 97-98, dunno. Look at the online used car guides and go from there, that is where I would start.
I think that is enough to get ya started and like I said, where these questions are concerned you will get many opinions, read as much as you can and make your own decision.
Darion
Oh ya, try doing a search for a topic on the forums search engine, may find good info there.
I have the Corsa cat-backs which have the resonance cancelling in them. They are almost quieter than stock when cruising.
As for the radio...I agree with the other post...replace either the whole system, or the amps and speakers. My coupe radio is almost non-existant when the top comes off.

Mark
i am running LG long tubes with Z06 mufflers.
at cruise speeds all is good, still quiet.
nice sound when your foot is in it. should be no problem
in a vert. and it sounds much better than stock muff.
2. 97 is coupe only around 15-19, 98 convertable 19-22, 98 coupe 16-20. Will depend largely on condition and miles, very low milage cars can bring in more than my estimates.
3. front 18x10.5, 285s on tire, rear 18x12 and a 335 rear.
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http://www.ls1sounds.com/headers_cut...cam_gunter.wmv









What were the specs on that cam?