I fitted the side tubes today , took me 40 min for the left one and 20 min for the right one. Wasn't very difficult. The downside was that i had to remove the front mud flaps in order to do it. He are some pics.
Take out mudflap screws then the screws under the sill. These either pop out or unscrew when replacing just push in , open both doors then lift sill up from bottom gently popping the white plastic push ins at top of sill , lay sill on floor. S shaped bracket goes under car sill. Use small bolt and small brass insert large bolt and large insert goes front face of car sill after taking rubber grommets out you will see the hex shaped hole. This is a bit fiddly as you screw the nut on thread and try to keep everything in place. Once the brackets are in place put the sill back on don't pop on mark on plastic sill where the brackets are 65mm by 65mm cut piece out with jigsaw. Replace plastic sill on car popping studs back on , unscrew nut on bracket sliding the tube in on the underside tighten nut back up. Much easier if you can get a hand Screws back in mudflap. Job done
Installed the oem side tubes on my dynamic coupe. I wanted them to come out further like side steps would look, so I had steel extender machined and attached them to the supplied brackets. Came out great I love the look.
Hi All and this reply is especially to TinTin.. I am sorry to add this knowledge so late for such an old thread but I guess I should..
Tin Tin, if I didn't misunderstand, you installed your tubes without securing the rivet nuts with an appropriate pneumatic or manual tool beforehand, I must inform that this is really dangerous, maybe not to you while on the road but to the ones who are following behind, well it is true that when you tighten the nuts, the rivet nuts self-secure inside the hex holes but there is no guarantee that they have popped to the correct length behind the hex holes, especially the M8 ones on the sides require a serious amount of torque that one can hardly supply, since the rivet nuts fit flush into the hex holes, you may have thought that they have fully popped after a few turns only.
As side steps are my profession, I added the below photos to explain what I mean..