This is the popular "Walbro 485" pump in the high pressure version (of the 267). These are genuine TI Automotive pumps.
Fuel: FLEX
Horsepower: 750
Flow Rate (lph): 450
Flow Rate (gph): 119
Pressure (psi): 50
Pressure (kPa): 345
Max System Pressure (psi): 112
Max System Pressure (kPa): 772
Filter Group: B
Inlet Diameter: 14mm
Inlet Configuration: 0 degree outlet fitting to inlet orientation
F90000274 = F90000267 with higher pressure relief. E85 compatible. Will support 750+ hp
View flow chart