Thats ready for battle... That downpipe is awesome , I'd have it ceramic coated for better heat insulation, a good solution if you plan on keeping the car for a track machine.
Sounds like a real nightmare connecting this all up..., I reckon I/m going to go with an iPad install and an streamer... this Head unit business is scary shit.
Please am keen to go this route but worried, the guy in Germany told me the lights are not for right and drive cars... So I assume you just made a plan in the UK?