Description There is finally an option for 6 cylinder E39’s with a bottom mount turbo to have a legitimate inlet.  This SDi mount arm uses a stock mount isolator and is able to clear up to a 4″ inlet as tested with SPA cast manifold. Fits iron and aluminum M50, M52, M52tu and M54 along with S50, S52 and S54 engines in E39 chassis Made from thick 3/8″ steel with a heavy duty powder coat finish.  Comes with grade 10.9 mounting hardware