Just wondering if anyone knows what the difference is between the vp and vr injectors, fuel rail, regulator and intake manifold? A mate of mine owns a vr v6 and the other day while his bonnet was up i noticed that his fuel rail and regulator were black. Upon closer inspection i also noticed that his injectors have black tops and his manifold has no thermostat, where as my fuel rail is a dull silver colour and my regulator is a brass type of colour, my injectors have white tops and my manifold has the thermostat in the front on the drivers side. His fuel rail and regulator are a bit bigger aswell, also my rocker covers are plastic and his are metal. These are standard factory gear on both cars. I am curious because i always thought that these motors were exactly the same and if there is any power to be gained by replacing my injectors fuel rail and regulator to vr ones then i think it would be worth it. Any know what the difference is? Can someone who owns a vr have a look and compare these to yours for me as i have been told that they might be from a vn series1 motor.

arnt coil packs different aswell?

vn series 1 has the black fuel rail and reg. also has the radiator hose running to the back of the engine.