how can i find out what gear ratio my 99 a-4 has.i was a mustang man for years.i know mustangs inside and out but know very little about the z-28.would like a little help getting started on mods for my z-28.what to do first,best power gains for the money that sort of thing.

 

Look for the following codes in your RPO sticker on driver's door:

GU2 = 2.73
GU5 = 3.23
GU6 = 3.42

As fars as the mods go, read a few pages and you'll come up with plenty of information.

TS