Your Nikko wont ever be a really good drift car my man, sorry to say that. You need to be looking at a 4wd proper elec touring car, the TT-01 is again a good example and almost as cheap as it gets to enter this sport, you need to be thinking along those lines anyway.

As for PE piping it is PolyEthelyne, comes in several grades Low, Medium and High, it is used by the D10 drifters in South Africa as ABS is not widely available, it is argued that PE is better than ABS giving more grip when you need it but sliding just as well, it does come in black, I'm almost certain they used M.D.P.E (medium), I have never found any the right size in the UK to have a go mind.