I autocross my '00 A4QMS in G Stock:

If I have a theoretical best time of 60 seconds (and the best time in class is ~58 seconds) on course x, how much would the following mods improve my time:
Koni shocks,
Kumho (or?) tires on lighter wheels,
Exhaust,
Front sway bar,
or ?

TIA for any responses.<p>Mark
'00 A4 1.8T QMS

Tires, tires, tires.
There have been a number of tests in Grassroots motorsports that verify that the tires made all the dif. The Audi in particular is WAY undertired and cambered. Kumho is inexpensive, 225/50/16. Gain seconds.

Next, for G-stock. Koni double adj. shocks. Worth just less than R-tires, a lot more spendy. They give more pseudo spring rate. Gain seconds.

Race or street exhaust? Race is good for a few tenths.

Wheels, not worth anything.

Front bar -time.