Fairly priced mods

wstar

Does your Z have the sport package? The spoiler on the sport package is nice, and can be purchased/installed separately. A lot of aftermarket spoilers are just for looks - nobody did any testing to see how they affect coefficient of drag and downforce at various speeds. The stock sport package one looks like a good tradeoff with low drag, and probably had at least *some* research go into its design.

The simplest mod to do is going to be a cat-back exhaust system, but they tend to be a bit pricey (mine lists for about $1500, I went with Stillen). High-flow cats are cheaper and will also provide some decent gains. You could do either or both depending on how you feel budget-wise. Check out the Intake/Exhaust forum here in the Tech area for info about this kind of stuff.

Also, while I've got your attention: if the dealer installed locking lugs on your wheels, check to see if they have washers at the base like the other 4 lugs on the wheel. If they're just straight narrow cylinders, they're the wrong one (go tell your dealer to order the right ones for the car, and to put some regular lugs on for now so you don't damage the wheels or studs).

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Journal thread / Car setup details

molamann

Care to explain in detail?