MHC+ BMW M3/M4 Twin Fin Ducts In Pre Preg Carbon Fibre (G80/G81/G82/G83)MHC+ Carbon Fibre Twin Fin Front Ducts for the BMW G80 G81 M3 & G82 G83 M4 were designed to transform the vehicle's front end, especially when combined with the MHC+ SP1 Front Splitter In Pre Preg Carbon Fibre. The aggressive twin fin design matches up with the SP1's duct lines for the ultimate G8X front end transformation. Whilst the MHC+ twin fin ducts work great with the SP1 front lip, they are also great as a stand alone front end upgrade for a