Today’s fuel pumps are world apart from 30 years ago. I the 70's and early 80's fuel pump were a mechanical component driven by the engine. when vehicles started going to fuel injection higher fuel pressure was needed. The electronic fuel pump became the new standard because it was able to produce higher pressure and be modulated. (speed controlled) Today you will find most all fuel pumps in the fuel tank. the main reason fuel pumps are in the tank is because manufactures believe it's the most economical way to do it. (easier to push it then pull it.) This can be a problem in some regions do to rust and corrosion. There are a number of reasons not to use a cheap pump such as what it cost your if it fails. Most cheap pumps have a "Lifetime Warranty" right! They most often do not pay the labor which can be 3-4 hour at 90 to 125 dollars per hour. They don't pay towing and we all know that its going to fail when you need it the most! Cheap pumps have a much higher rate of defect then quality pumps do. That's why they offer the "Lifetime Warranty”. Trust us when we tell you that a Quality pump is more affordable.