BC Racing BR Coilovers 2007-2014 AUDI TT AWD/FWD Hydraulic Handbrake Lines The main difference is that

The main difference is that an AOS system returns collected oil back into the oil pan so there is no servicing required

Each HEL brake line kit arrives complete with every essential component

Next to this

and eliminates the risk of overcooling

BC Racing BR Coilovers 2007-2014 AUDI TT AWD/FWD Hydraulic Handbrake Lines The main difference is thatThe BC Racing BR Series offers the most affordable entry into coilover suspension without sacrificing performance, comfort, build quality, vehicle height, or handling. This is done by extensively testing each vehicle then refining the coilover characteristics as many times as needed to ensure the most well balanced and affordable aftermarket suspension conceivable. Highly Customizable Mono Tube Shock Design Linear Piston And Damping Curve Height