Heavy duty side plate for IRS transmission case Beetle 1302/03, Karmann Ghia 08/68-Due to the increasing demand BBT has taken these aluminium heavy duty transmission case plates into the program. They are mostly adequate for use with gear boxes for competition. Most of the times these gear boxes had to be adjusted with a heavy duty differential (BBT 1420 1421) and strengthened driving shafts, resulting that the casing was suffering considerably. This heavy duty aluminium plate replaces the original cover plate and prevents that