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I lowered mine all the way on stock bolts. I didn't notice any gain in performance, but my vert doesn't look like a 4x4 anymore with the 19/20 wheel combo with low profile tires!
Most people do it for looks. I lowered mine about an inch for the Big Bend Open Road Race last year. My thinking was to try to reduce the amount of air going under my car at 168 mph (my tech speed). I didn't want to slam it though because I didn't want the suspension bottoming out.
After the race was over, I kept it lowered because I like the way it looks.
I will never understand how those guys drive their C5's slammed. They must be crazy.
I also do not understand the 4X4 look that the one post said they got rid of. Mine is stock, and I have to watch too many places now so I do not drag bottom parts. I will never understand why one would want to create more hastle for oneself. I think that the vette looks great just as it come off the line.
I lowered the front all the way on stock bolts. Mostly for looks but also to cut air flow under car at speed. Not sure if I get any benefit beside the look VS stock-less gap between tire and fender. See EG the 4x4'er
Really, I was looking at my Vette yesterday and the space between the top of the tire looks ridiculous.
That is what peopl are sying, & IMO your Vette should be lowered on the stock bolts(at least) to achieve that nice look of filling up your wheel well with rim & tire.
Looks much better that way.
Im no expert but I think center of gravity is lowered, and there's the aerodynamics of less air under the car, which in turn forces more air over the car. Which increases downforce, gripping the road better.
I would imagine it also compresses the springs giving you better ground contact and feel and decreasing body roll in turns.