I'm driving an 2001 SS A-4 I would like to gain .2 in the 1/8 mile would any of these help and by how much.??

 

I dont think you 'll squeeze .2 outta one, I use the Predator but doubt its likely. You can gain with it, especially in the A4, due to the trans settings and adjustability. I love the way the trans shifts now, even with the convertor i have shifts like a shift kit was in an old trans, nice and snappy but not overwhelming.
Depending on your mods, you might get it by leaning it out or richening up the A/F, add timing etc...I dropped around .13 in the 1/8th i think.