I ordered a 255lph fuel pump from tuning developments as my car is going there to get mapped on the TD04 on friday. Today I went out to fit it and when I pulled the old pump out, it already has a Walbro one fitted. I would imagine that the Walbro unit is a 255lph one but is there any way to tell if it's less? Also would I be better fitting the tuning developments one or will the Walbro one be fine as it's only 2-3 years old?