Glad you found us Ollie
This is the place to be if you have a SEAT
I notice you found the post in the for sale section for the changer
I was going to suggest posting to see if it had gone yet, if it has just place a post in the wanted section and one will not doubt come along
As for your mate there is a few things he can do, (I have a '99 GTi myself but have not ventured under the bonnet yet) also it would depend on if its the 8v or 16v
there are cams, filters, exhausts, chips, FSE power boost valves, and also Bill @ Badger 5 does direct to head throttle bodies for the cars, the cars are gettiong on a wee bit now and pretty much anything you can think of is available for the car
The first thing I will do to mine will be a filter and exhaust then go from there
It all really depends on what he wants to do, my advice would be to shop around for the bits he wants and if he registers on here, being a member he would also be intitled to discount from the companies we have on board
Hope this helps a little mate
Dave