best modification combo

[white96six]

hello I am looking to modify my car or start modifying it. I am thinking of doing intake, flowmaster cat back, 160 stat,i piece aluminum drive shaft, a posi unit, and maybe gears. it is a 1996 m5 I want to make it have a little more power for now but also buil a good platform for a cam and head swap. and maybe a supercharger way down the road. what do you think my car would run in the 1/4 mile with the above mods not the cam and heads or supe just the first ones? is that a good way to start?

[staticpike]

15.7ish stock, 15.3ish with the above mods depending on gears.