They can be added aftermarket I belive as mine was but in at the dealerships. I wouldnt woroy about other companies installers just find a good one (there are a lot) and you will be better off.Quote: Originally posted by EvilJohn on 14 May 2004
Can it be fitted after a few years? Id like to get a cat1 for mine and not convinced that aftermarket ones would be fitted right (heard a lot of horror stories)