Phil:The correct Walbro 255lph pump for our car is part number 342.
A local forum member came by and needed some help with his fuel pump replacement. He had found a thread on LT with a Walbro part number listing part number 341.... The in-tank replacement that you need is 342 NOT 341.
The pumps are the same except for the inlet and the outlet are flipped. Luckily I've got a bunch of both styles, so no big deal for him...
Hope that helps,
Do you have Walbro 255LPH for 2008 Exige S & 550cc RC injectors?