This kit has all the necessary hardware to install UPGRADE RS4 / RS6 Inlets 

Includes: 2 - Turbo to downpipe gaskets (1 per turbo) 2 - Turbo to exhaust manifold sealing rings (1 per turbo) 2 - Inlet pipe sealing 0-rings (1 per turbo) 2 - Oil drain pipe gaskets (1 per turbo) 8 - Turbo to downpipe studs (4 per turbo) 6 - Exhaust manifold to turbo hex bolts (3 per turbo) 4 - Boost reference line sealing rings (2 per turbo) 4 - Oil feed line fitting sealing rings (2 per turbo) 1 - Oil feed line adapter sealing ring-thicker (1 turbo only has this) 8 - Coolant feed and return line sealing rings (4 per turbo)