Im sorry if this has been in discussion but im thinking of buying one of these soon. i just need to verify its worth my money before going through with it. First i have the 4.7 and i called flex a lite to see if it would work they said it should as long as my coolant/washer fluid reservoir was a single unit. Next will it actually help hp/torque? Does it come complete with everything needed for install and is a 180 t stat needed? Lastly has anyone bought the setup from amazon for around 250.00?