Which of these would you rather have?
Seems I would use the midrange more but I just got 16t front( not put on yet) how much harder do I really need it to pull in the midrange on the streets?

06-09 ZX-14 Velocity Stacks
These precision machined stacks offer great performance gain for the ZX-14 by increasing the engine's dynamic compression.

25mm Mid Range Race Stacks
For all street and most race applications
+4-5 HP through midrange and +2 at the top end

P/N Description Price Order
0049-00112 06-09 ZX-14 25mm Midrange Velocity stacks $249.95

15mm Top End Race Stacks
For drag race applications only
+4-5 HP at the top end and +2 through midrange

P/N Description Price Order
0049-00111 06-09 ZX-14 15mm Top end Velocity stacks $249.95

P/N Description Price Order
0049-00112 06-09 ZX-14 25mm Midrange Velocity stacks $249.95

This would be my choice. I want that 16t to keep bringing me the bottom so I can squirt from the fenders. 15mm is too short and will lag the bottom or more slow the bottom movements but work better at the upper rpm range.

Hub, (and any others in-the-know)
you seem to know a helluva lot about exhausts, tuning, etc, so perhaps you can initiate me as to my criteria:
getting a 2007 zx-14, saff blue, was dumped on left side. I hate big pipes, (cans) want either Muzzy or R77, but:
4-2-1, min. hardware, less weight, keep it low (NOT big wide shiny tubes with huge graphics, keep lean clearances intact, stock lower fairing, AND ---no increase in dB levels. Not out to impress anyone but myself. What should I use, the Titanium GP version remember, low sound level is important. Small, low is less weight, but too loud?
2. I'm big, 6'-4' 260 lbs, aftermarket lower footpegs?
a. New CF fairing (higher?) need to replace old one anyway...
3. mirrors, go with stock or (my size) would leave me looking at my arms? Longer mirror arms? function important for better view
4. Paint job. No, I hate the shiny blue, hate flashiness, love a quiet stealth. Thinking carbon fiber nat. finish fairing (higher bubble rise) matched w/a matte black rat rod dull finish elsewhere (EVERYWHERE)

Where to look for parts? Where aftermarket fairings?(Higher center bulb) What manufacturer has the smallest, low pipes with least noise? Obviously expect some performance increase. Yes, I too prefer stock. May add a bold (clear translucent) horizontal flourescent stripe
for safety, slightly changing the paint gloss texture, but same black for side illumination at night. Ton of ideas, appearance-wise, need some diection where to go. Thx Q
Previous bikes Harley '98, Honda '76 goldwing (no fairing) BMWs, GS1000, GS1150, GS1250PD Adventure,

Qp,
What I do not have are the exhaust systems to direct you to the one you mention. You'll float back to your intro, and I addressed your Q's over there. Other than the input from that fairing change, that is about the only warning I would not mess with.

We raced a bike once with an aftermarket fairing on it. Once I hit the front straights, the handlebars were a fight all the way. I have video of it and every lap was the same fight. So, between an old member that rides hard, told me that his smoked aftermarket really changed the way the bike hit the air.

So, you can tell, that bike was pretty much developed in a wind tunnel or some sort of smoke over the air stream to view the potential wobble or ill-handling that bike can play on a slight bubble rise.

Since my net connection was out on their side for a few hours, I went out on the bike before the heat wave came. The higher in rpm that bike made, the smoother it ran. Like, 3,800 rpm and it smooths out.

I don't know if you will lose that sort of smoothness on a 4-in-1. I am semi-4-in-1 with the stock duals. If you like to tour, you will have less fatigue if the bike buzzes less. Just a thought on the pipe swap.

Thx hub,
keeping the stock front fairing, exhaust must fit under the fairings below, just looking for less stuff -hate the ostentatious rear "rocket launcher" tubes. Too damned big. Like the low Muzzy's 14 IF they are NOT obnoxiously loud.
Also new tubes mean a PCM retune is required? 2 bros Juice box or Dynojet PCM? Don't believe aerodynamics are affected, see GP bikes. I'm not going to be cruising at 120+ mph a lot, I promise. Is there a slip on 2:1 that will do the trick without all these other retuning things?