With regards to fitting these, without having to take the whole front bumper off, does anyone know if its possible to just remove the undertray on the car to allow me access to fit/tighten the bolts up???

 

 

I ended up taking of the front bumper for my splitter.

Was not as complicated as I anticipated, but you do need a hand when removing the bumper to help disconnect fog's, washers etc.

 

You can do it from underneath, but it may be a bit more fiddly. With the bumper off it may also be easier to align the splitter. The undertray is held on with pins, where you pull out the head in the middle first and the rest then comes out.

 

Re diffuser, I am having it stuck on on friday, but it's going up on a ramp in a workshop