the Walbro 400 LPH "turbine style" in-tank High Pressure fuel pump is a brand new aftermarket release for 2011. Designed to meet the fuel-hungry demands of modern turbocharging enthusiasts the Walbro 400lph High Pressure unit can flow close to the amount as dual intank pumps or large externals but in a small, convenient and surprisingly quiet package. This pump is a great solution for high fuel requirement turbocharged cars >500hp and anyone looking to make big power and run high boost with a simple fuel system where the 255 won't suffice. This much fuel flow is not meant for use on engines <400hp.



Walbro based the overall design on the same 39mm motor from the proven 255HP but changed from a "gerotor pump" to a newer and more efficient "Turbine pump":

^^ Walbro's turbine pump head uses two sets of turbine blades set in parallel on a common shaft (like a jet engine). This high efficiency pump design pressurizes the fuel as it flows through the pump axially without forcing the fluid to change direction - the end result is tremendous flow rates at a variety of different rail pressures and to suit various injector sizes:

The Walbro 400 is a simple drop-in install for many vehicles such as nissan s13/s14 240sx, turbocharged 88-01 Hondas and Acuras, Mitsubishi Evo X and many more. GC and GD subarus can use this pump, although certain year STI's will want to remove the STI fuel filter (intank) + swap to WRX filter on firewall. Modifications may be required for certain vehicles due to the large 50mm base - Evo8/9 and 2006+ Hondas will require slight modification to the stock housing (we do not offer this currently). This pump uses the same plug as a traditional Walbro 255. External FPR strongly recommended