GF has a 98 a4 ta vert. We are adding full exhaust and lid soon. Wondering if she keeps the stock converter and sprays 100-150 wet thru the car, should we step up in gearing or will we be shifting overdrive at the end of the track with 373's or 410's?

 

With 275 tires 3.73 gears would be good for a 123mph trap at the very top of 3rd gear. 4.10s would top out at 112mph in 3rd

 

Thanks for the info. Just kind of waiting to see where we should spend money first. We can always keep the spray for later where as we can't use the gears in a 9inch rear.