ridiculously easy noob question
but then I got to thinking, maybe I have the z51
How can I tell for sure? Is there a designation in the glove box for it, like with the axle?

The following link has one of the most comprehensive lists of C5 RPO codes that I've found:
Chevrolet Corvette C5 RPO Code List
Following are the RPO Codes for the various C5 suspensions:
F45 Chassis, Selective Real Time Damping
F55 Continuously Variable Electronic Real Time Damping Suspension by Delphi (Often referred to as Magnetic Selective Ride Control)
FE1 Base Suspension
FE3 Suspension System, Sport (part of Z51)
FE4 Suspension System, Z06
Technically RPO Z51 is the Performance Handling Package. It consists of the RPO FE3 Sport Suspension and a power steering cooler. If your car has the Z51 option, you RPO label should show both the FE3 and Z51 RPO codes.
Hope this helps.
The Best of Corvette for Corvette Enthusiasts
Powersteering cooler (about 12 long down low)
3.15 Rear Gears
Larger Front and Rear Sway Bars
It's probably one of the best value options you could have
gotten with a new purchase.






I mean, throw some sway bars and shocks on there for like $700, but will that make a noticeable improvement, with little or no detriment to daily driveability?
experts need to chime in
If you want to improve the grip, my recommendation would first of all check the alignment and optimize it for the type of driving you do (taking into account how much corner carving you do versus highway miles).
If you want to improve body motion control, I would go for shocks.
Tires would also make a huge difference, especially if the car still has the original equipment run-flats.







(even though I've stayed with the run-flats)
Car & Driver compared all the then-current Corvette suspensions back in September, 2003. I believe this article is still relevant:
http://www.caranddriver.com/features...disbelief.html

(even though I've stayed with the run-flats)
Car & Driver compared all the then-current Corvette suspensions back in September, 2003. I believe this article is still relevant:
http://www.caranddriver.com/features...disbelief.html
From the article:
"The first conclusion that leaps out of the test-results box is that switching to Z06 tires almost brings the base and MSRC cars up to the performance level of the stock Z51, and the F1 Supercar tires bring the Z51 to within a nose of the Z06 in the tighter maneuvers that negate the Z06's big power advantage. On average, the tires alone improve skidpad grip by 0.04 g, lane-change performance by 1.7 mph, and autocross and handling circuit times by 1.3 and 1.8 seconds."


















