hello - witch in tank fuel pump flows the most fuel ???walbro /holley /bosch /ect.ect. if it's the walbro

does anyone know the correct part # & kit # for the walbro fuel pump

that fits a 2004 5.3L silverado 4x4 returnless system . is it the gss 340 ? or

341 or as the part numbers changed .. all help will be appreceated .. thanks

 

I have a holley in mine. The holley pumps are made by walbro though.

 

I don't think any brand flows more than another. They are all rated in flow per hour (e.g. 255 liters per hour) and you just need to calculate how much flow you need and get one (any brand really) in the right range.

I like my walbros.