very easy, just get APR stage III and you will have more than 350hp at fly wheel, and 1/4 is about mid 12s according goapr.com and some videos i've seen on their site, the kit is about $4k, or you can get atp with GT28RS H/W Kit - Transverse which is about $2.4k which will give you about 350 whp, which means your looking at 400hp at fly wheel. Now with either of those setup's you will be walking over those sti's or evo's. But only if they are stock or slightly modified, if evo/sti are heavily modified you got no chance.
Here a pic of prove of gti hp with atp turbo upgrade
