This is a kit that contains all of the hardware needed to install new catalytic converters on your Audi 4.2 liter engine (engine code BVJ). The catalytic converters on this engine are part of the exhaust manifolds, so if your catalytic converter has failed, your exhaust manifold must be replaced as well.
This kit contain the following parts to make installation of your new catalytic converters as easy as possible:
12x Exhaust Manifold Studs (Installed in the cylinder head to secure exhaust manifold)
12x Exhaust Manifold Nuts (Secures exhaust manifold to cylinder heads)
2x Exhaust Manifold Gaskets (Seals the gap between the exhaust manifold and the cylinder head)
2x Exhaust Downpipe Gaskets (Seals the gap between the catalytic converter and the downpipe)
6x Catalytic Converter Bolts (Secures the catalytic converter to the exhaust downpipe)