Short Boss Kit for BMW E30This slim boss kit is compatible with all standard aftermarket steering wheels with a PCD of 6x70mm (an adaptor is required for Nardi steering wheels with a PCD of 6x74mm). These boss kits are known for their short height of about 40 mm and guarantee a perfect installation in place of the stock set up with a high quality finish in a solid monobloc aluminium structure. They are ideal for tall drivers and/or narrow interiors.Warning : The slim boss kits are not compatible with horns/quick release due to their lack of depth. Mounting possible only if modified with hub adapter spacers.