Today we fitted the GP diffuser to our MINI Coupé SilverBeast and we wanted to share how we did it, as it could be a big help if you are thinking about doing this.

First, at the very least use car ramps. We invested in a set of sexy red ones from ScrewFix. Next up watch the video at the bottom of this blog.  Then take note of the tricky bits and look on here for a few tips.

 Once the car is on the ramps you need to remove the existing panel that resides where the diffuser will go. The hard bit is removing the two screws at either side. To do this first pop all the fasteners on the back of the panel all the way along the top. Press them together and pop them out. then push the panel right out so that it pivots on the two side screws.  Now apply WD40 to the two side screws to free them up.  These screws are 25 Torx but if you cannot get a screwdriver in beacuse it is such a confined space, then you can access, not the head of the screw, but the thread of the screw with fine pliers to get a few turns on, as the WD40 will have loosened them. Now you can undo the screws with your fingers presuming you still cannot get at them with a screwdriver.

Now take this opportunity to give your stainless steel exhaust tips a clean.

 Now fit the two brackets, one at a time by undoing the two bolts holding the exhaust on and sliding the bracket in between the car and the exhaust bracket fixing as in the picture below.

 Next fit the part of the diffuser that surrounds the exhausts and replaces the panel that you first removed from the car. As in the video below this is a bit fiddly and be sure to press home each sliding peg firmly while supporting where you press from behind. Once this is done you have the two side screws to put back. These are fiddly. Oil the screw threads with a touch of WD40 and with your fingers locate the screw in place. We could not get a screwdriver or anything in here so we slowly turned the screw by hand while the other person squeezed the two parts together to keep the pressure off the screw. That is Peanut turned the screw by hand while I pressed the diffuser panel up to the  bumper edge. This way we were able to tighten the screws all the way home by hand. I think this is worth knowing and trying, as some people have just not been able to get these screws back in. WD40 is your friend.

 Now in the video, the guy has all kinds of tools and he says keep the brackest loose, but we lined them up carefully and tightened them up straight away as once the panels are fitted to it, it would be hard to access these brackets.  So now we have the back end of the diffuser fitted and the brackets fitted. We just have the panels to fit.

First, slide the metal clips that are with the screws onto the edge of the existing undertrays that run the length of the car, checking that you put them over the correct pre-existing holes. There are two on each side, though this video only seems to show one. Then the diffuser panels are fitted by first sliding them up to these existing panels as they have a peg or edge, that slides over the existing panels. Line all the holes up and fit the screws and bolts that you have to secure these in place. Job done.

In summary, the hard bit is the two side screws on the original panel, both getting them off and refitting them. Crack this and the rest falls into place. Intial testing has revealed a 0.1 second improvement in the 0-62 mph times but more importantly a smoother trip back in time when this is used in conjunction with your Flux capacitor at the vital 88mph!