The Bosch 044 External Inline Fuel Pump is the pump of choice for quality built performance cars. A quick google search will show the people going fast doing it right are using Bosch not walbro. The Bosch pumps continue to perform at higher pressures where lesser quality pumps choke off and reduce flow.
Inlet Thread: M18 x 1.5
Outlet Thread: M12 x 1.5
for use with -6AN and -8AN fittings (not included)
Dimensions: 196mm Length x 60mm Diameter
Weight: 1030 Grams (2.27 Pounds)