autoenginuity
has saved me a lot of money not having to take to a repair shop. You just keep going through each faulty code google each code and repair it yourself.
it is so nice to be able to see each problem, and go through them one by one. this thing saves me so much money, i would say everyone should have one of these. It makes it so much easier to find the problem instead of throwing parts at it to fix the problem.
noise level
my truck has 250/200 and its quieter than a stock truck with all the mods to go with those injectors. i still get 16 plus miles to the gallon and better if i can keep my foot out of the peddle.