Arrived today... ended up with blue as they were out of black and silver ones. Going it back to strup the paint and redo it black if I get a chance to. The silicone hose that came with it is crap so have ordered 2m of black hose from Auto Silicone Hoses

my Cupra is going to the garage for more repairs on Friday so getting it fitted then.
Matty - its smooth inside... no baffle.
Hobbiniho - how often are you going to drain yours out?