Originally Posted by
oledoc2u
I know a walbro will flow with the 55 pump....not sure the pierburg will. Usually, with the new pulley, 255 walbro or sl55 are the choices. I wouldn't risk the other. I would go with what is known to work. just my .02...good luck...
The SL55 is the Pierburg. Seemingly both the Walbro and Pierburg SL55 are under the same parent company.