If you are a serious modder that wants bigger power numbers and do it right this is simply a no brainer, period.
The price point is so incredible penny pinching makes no sense.
Think of how much money you spend on fast food, which is not actually worth eating, in just one month, use that towards the best IC you can find at any price....
Keep your stock parts, not worth anything anyway, ever need to go back to stock, trade in, sell, some arse wipe rear ends you, roll it in ditch, etc.....get another FiST, get a different car and sell this setup....