Originally posted by Lee Cox:
The lower intake is what has the fuel rails and the injectors on it and connect to the fuel lines. On the 2001 3.0 Taurus the lower intake is returnless. You have a Return style since your car isn't a 2000.(that's when they changed) If you were to change to returnless you'd have to swap the fuel lines, gas tank, fuel pump, and PCM out of a 2000 SVT. No small task and to think i have to do this...
The fuel rails will swap between lower intake manifolds, it wouldn't be prudent to swap from returnless or vice versa anyway because you'd have to change fuel tanks, lines, ECU's, FPR's. etc... just wouldn't be worth it... The 3 liter lower is about 1mm larger than the SVt unit, but the secondary actuators must be modified to work with the 2.5 uppers...
