Fuel pumps can be scary to mess with if you've never dealt with one before. You have a volatile fuel and power wires going either right into the fuel or passing very close to it. While they're fairly simple, fuel pumps can be a little daunting. On top of that, you have choices to make when you purchase a fuel pump. For custom applications, external fuel pumps have been the mainstay. You can run them (external pumps) inline without ever breaking into the stock fuel tank, keeping the factory fuel pump and letting the stronger externally mounted pump pull fuel straight through the factory pump. But, external pumps are more audibly noticeable and can be susceptible to heat from exhaust and drivetrain pieces.
Ideally, a drop-in, stock replacement style in-tank fuel pump is often going to be the best option for enthusiasts with larger fuel demands but stock fuel systems. The drop-in fuel pump will be silent, remain cooled (by the fuel), and will be completely hidden and unnoticed by anyone but you, the installer.
Enter the Aeromotive Stealth 340 pump. The Aeromotive 340 Stealth Fuel Pump is a high-output, in-tank electric fuel pump that fits many popular EFI applications, including a lot of '90s and early 2000s trucks and 4x4s. What makes the Stealth 340 different from other stock replacement pumps is that it can pump more than 340 liters per hour at 40 psi—that's more than double of what some stock fuel pumps put out.
When it comes time to replace a fuel pump, the Stealth 340 can be a great option for stock motors and all the way up to more than 700-horsepower demands.