Description For all E46 Non-M cars. This adapter sleeve and clamp simplifies the installation of Aeromotive, Walbro, or other 39mm body fuel pumps into the factory fuel pump housing and carrier. Included is a stainless steel hose clamp to secure the fuel pump.  Installation is simple. 1. After removing the factory fuel pump, slide the sleeve down and snap into place. 2. Attach the clamp on the bottom of the sleeve and tighten enough to hold it in place. 3. Insert fuel pump into the sleeve, position the bottom of the pump and tighten the clamp.