I don;t think he will....lets see, IM running on the KKM intake with a RU-3530 K&N, fidanza flywheel, Quaife LSD, 2 3/4 exahust from the cat to 40 series flows (i use to have MSDS) And after all that i saw a 7 hp increase....so id say with all your mods 20 is reasonable...see you ahve to under stand...our cars (because of SVT) are already pushing near there limits (except forced induction, or any major head work...im tlaking bolt on mods) So like many other have said, don;t expect any miracal mods anything shorter than F/I.
Oh and with the AEM intake, make sure that it's inner diamater is just as wide as the throttle body and MAF...also make sure the MAF adapter is wide too (if you have an SVT...sorry i forgot). the AEM was designed for the courgar/stock contour V6 which has a smaller maf and throttle body. so on the SVT it would cause restriction instead of help.
Roz
The end of the filter has a cap, so no air from the wheel duct can enter it. I'm going to try and scan the instruction.(which are a photo copy) I don't know alot about cars but it looks like it will be a negative add on. Please give me advice!! 
"SOMETIMES IT TAKES PAIN TO MAKE THE BRAIN WORK HARDER"