1972 Porsche 911S 'Oil klappe'The 1972 Porsche 911S lklappe is one of the rarest and most distinctive 911 variants, produced for just a single year. Nicknamed lklappe (German for oil flap), it featured a unique outside oil filler flap on the right rear fender, specified by the engineers at Porsche in their ongoing work to improve the 911. Racing experience had shown that the re location of the oil tank to the front of the rear wheel, helped to improve handling. Unfortunately, many