[ron1111]

I've sold my 21 reg X4 MSport 20d and now have a 40d X6, so the Chip Express unit I installed 3 months a go is available for sale.

Performance gains you can see in the screen shot and in real life driving it makes a big difference.
I paid list price for this (£445), but will sell for £200
It's still in "like new" condition and performs perfectly.
Easy to fit, takes 10 minutes or less.
Free shipping within the UK.