These are some slick pieces that make jet installs and jet swaps in hard surfaces easier for the installer/user.
Typically most jets are located in a cold side hard or soft pipes, sometimes the jets are located in manifolds for port injection setups.
The Aquamist hard pipe/manifold jet adapters (soft pipes as well) come with blanking plugs so that if a jet were not to be installed right away the opening can be sealed, same for as when a jet later needs to be removed = no open holes.
A real benefit of jet adapters is the ease of jet swapping. Its probably one of the best methods to assist with testing different jet sizes. Install a jet or jets and then either do a road or dyno tune, if it is determined that a jet swap might yield a better result, it takes only a minute or to after gaining access to the jet location to swap the jet or jets (or remove completely and blank off).
Because the Aquamist jets are small, more and varied locations are available to the installer/user.
Another benefit of these jet adapters is.......the WI install looks like a factory install OR at least like the install was done professionally = even a weekend mechanic can do an install that yields professional looking results. Aquamist jets and jet adapters are relatively easy to hide = does not have a finished look like the plumbing section of the local hardware store or Home Depot has been emptied of fittings.
Install is simple, drill a hole in the desired location, tap the hole, thread in the adapter (use Loctite on the threads) walah......done.
NOTES:
The Hard pipe adapter is 1/8 BSP 28TPI.
The tapping drill bit size to use is 8.8mm OR 11/32 inch.
Use a very little Loctite on the threads, see the linked page for more info...I think #246 should be fine
http://www.loctite.com/int_henkel/lo...d=114&layout=3
Try and get an idea of how thick the manifold is where you are going to place the jets....a tiny pilot hole should do the trick. You might need to machine that area a little so that after everything is said and done the jet adapter is flush with the inside intake wall and is not recessed.....this can be seen in some of the below images
BSP = British Standard Pipe "G Series" (A.K.A. British Gas, British Pipe Parallel, or Parallel Fastening Thread)
TPI = Threads Per Inch
www.tapdie.com
(Located in England)
Has the tap (order code STPB08) for 4.50 each (GBP)
Has the tapping drill bit (order code HDM08.80) for 5.07 each (GPB)
This page has some good background info for tapping = might want to to a look before starting the job.
http://www.tapdie.com/html/hints_on_...aps_dies_.html
This page has some basic info and tap - drill charts on BSP & BSPT = quick read.
http://www.newmantools.com/taps/bsp.htm#taps
(Located in The USA)
If you are interested in more info on BSP.....probably not but for those who like to read a little.
http://en.wikipedia.org/wiki/British...rd_pipe_thread
See post #92 Of MrCleanSRt4 thread detailing his Aquamist 2D install, for images of the Aquamist hard pipe/manifold jet adapters on the SRT-4.....the thread is pretty cool so if you have not looked at it spend some time and start from the beginning.
Im goind to install my 2d system soon.
Here are some images of the Aquamist hard pipe/manifold jet adapters.
Although below is an image of a jet mounted directly, it does give a visual of how things should be with the jet adapter
Below is an image of a soft pipe adapter for reference (see the soft pipe adapter thread for more info on this)
Aquamist Hard pipe/manifold jet adapters
Wish I'd waited, could have had a tap for 1/3 what I paid. 
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