Change Up Icon And Other Mod Ideas

right guys, on my fiesta i currently have no icon or led to tell me when to change gear, i know some of the high spec ones have this, so what im saying is can i install an led into the dash or like the dodge viper, have a picture apear on the dashboard / speedo of when to change gear?

also can you any way use a boost gauge on a non turbo car ? (may be a stupid question lol)

does anyone know any way or a nice little space to put an open cone air filter, ie inside wheel arch, ive had a look and pipes and everything isnt a problem to sercure its just finding somewhere to put the filter i was thinking maybe just behind the front grill and mount a little braket onto somewhere??

last idea is the focus rs side vents, will they fit onto the side of the fiesta in the same place?

and the bonnet vents??

any help on the mods above is much appriacted cheers