nice car mate. Your rear lights are infact standard and not "clear and red"

you can de-amber them from inside though which looks much better

also get a straight filter to turbo pipe run and relocate the battery to the boot or where the filer sits now

get an oil catch can and lose the stock oil seperator. get an oil cooler and put a cap on your overflow tank

but most important of all change the standard brakes (uprating the discs is not good enough really)

once you do all that the cars perfect at 1bar no need to try and do any more IMHO