For you A4 guys I would go the same route as Joe99SS. He had headers intake lid exhaust cutout Y pipe and most importantly a good high stall converter. With those mods he ran 12.2 at 111 mph. Thats about $1200 to $1500 in mods depending on which headers and stall you get. Thats the route I would take.
Or you could just slap NoS kit 5177 on there and spray a 125 dry shot and run low 12s for $500
aL
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if it's cheap & reliable, it ain't fast, if it's fast & cheap, it ain't reliable, if it's fast & reliable, it ain't cheap