KW Adjustable Rear Camber Arms Kit Audi A3 S3 8L Quattro (96-03) 68510061

The rear wishbones pivot up and inwards the lower you go. Great for arch clearance but bad for tyre wear! Dropping the car a max of 40mm will probably not affect the camber too much but going any lower will affect the camber in a big way.

eBay