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For a simple mod that looks fairly complicated. jschira you said that it just tricked you intake into raising the injection pressure. What would be the advantage of that over a programer. It looks like its a little too much for the average type person.
There are a lot of vendors who sell boxes and programmers that do much the same thing. The difference is that the 10K mod can be built yourself for less than $10 in parts versus $100's for a box from a vendor.
The 10K mod dosen't need switches or rheostats or anything else. These are things that are added to make it adjustable, and to switch it off at idle.
If you just want to try it out to see if you like it you can simply take a 10K ohm resistor and push it into the plug for the ICP sensor. No need to build anything.
On a stock truck the 10K is said to make around 20hp. On my not stock truck the 10K added 8hp, and 32lbft of torque. Not too shabby for a $0.21 mod.