Alex, how much time have you spent hanging around a dyno? I ask, because the mods you list, I predict will net you about 5 hp/tq. Just a guess on my part, but have been in the game enough to know that you can not do those sorts of things and run numbers that you are talking about.
But, I'm always the pessimist, YMMV!
Think of it this way. Your talking about a 10% improvement, which could be looked at a 10% gain in efficency. DC has MANY MANY engineers pulling their collective hairs out trying to eek out 1%. Now, some of the ponys you can coral come at the expense of NVH, but there is no easy hp to be gained by bolting on a pully. JET, IMHO, is not worth the energy to whip it against the wall. There are many on another other forum who spent $300 on CAI, only to find out on the dyno that Dodge got the hemi hat right. It's actually a complex piece of engineering that increases low end torque (the god you have to pray to in a heavy truck). The thread IIRC, was over 20 pages long.
A lot of these bolt on wonder mods have a great advertising budget, and magazine coverage to match. I laugh when splitfire plugs say they get x hp and 3 mpg gain. Think how many more D's they could sell if they were posting MPG in 20's on that sticker. Hell, why fool around with the Multi Dissplacement System at all? Split fire has already solved the puzzle!
Closer to the heart, the Tornado commercial, featuring an Impala SS. Everyone in the performance circles with this car can attest they pull 220 -230 rwhp in pure stock form. Yet the commercial showed a pull of 210 or 212 hp in "stock" trim. They put the Tornado on and WOW! 220 rwhp! How'd they do that?
So, call me mr. Cynical, but with an engineering background and experiance, I cringe when people start adding up hp to be gained by mods such as what your suggesting.
If someone could really crack the computer, the basics like headers/exhaust/cams etc would show a real world gain. But, we are pretty limited with the speed density system.
Exhaust is nice for many, gives it a performance sound. Same with CAI's out there.
All the above just my opinion, and worth about what you paid for it!
Back to the party!