allard egr delete and breather kit on a 150 pd tdi bora

Has anyone fitted one off these kits to a 150 bora.

http://www.ebay.co.uk/itm/Allard-EGR...-/180713036907

Just after how easy it is to do and will it make a difference

I'd expect it to make a positive difference, but I'd also expect it to be illegal. If you investigate and find otherwise please post it here !