Our FBM Coolant Expansion Tank Catch Can is hand tig welded and powerder caoted for protection against corrosion. This product, not only replaces the factory plastic expansion tank, it also has a built in catch can. The catch can relieves crankcase pressure that robs power and eliminates the oily mess that the factory system creates. The FBMCT-CC-R35 comes complete with filter, lines, fittings, and a spare 1.1 bar cap to make the install a complete bolt on.