in 1961 and 1962, essentially a cabriolet-style body with a permanent metal roof. Engine Porsche designers decided to build the 356's air-cooled pushrod OHV flat-four around the engine case they had originally designed for the Volkswagen Beetle. They added new cylinder heads, camshaft, crankshaft, intake and exhaust manifolds and used dual carburetors to more than double the VW's horsepower. While the first prototype 356 had a mid-engine layout, all subsequent 356 engines were rear-mounted. The four-cam "Carrera" engine appeared in late 1955 as an extra cost option on the 356 A, and remained available through the 356 model run. Legacy The 356 has always been popular with the motor press. In 2004, Sports Car International ranked the 356 C tenth on their list of top sports cars of the 1960s. It remains a highly regarded collector car, regularly bringing between US$20,000 and well over US$100,000 at auction. The limited production Carrera Speedster (with its special DOHC racing engine), SC, Super 90 and Speedster models are among the most desirable. Multiple restored Carrera variants (of which only about 140 were made) have sold for values in excess of US$800,000, with the vast majority sold for more than US$300,000 at auction. , the most expensive 356 to sell was the daily driver of rocker Janis Joplin that was sold in New York by RM Sotheby's for $1,760,000 (£1,163,630) in 2015. Motorsport The Porsche 356, close to stock or highly modified, has enjoyed much success in rallying and car racing events. At the 1951 Le Mans 24 Hours, Porsche was the first and only German manufacturer to compete. Porsche fielded the 356 SL (Sport Light) "Gmünd-Coupe" with its streamlined aluminum body and covered wheels. The debut was a huge success: Auguste Veuillet and his friend Edmond Mouche won the class 751 to 1100 cc and received the flag as 20th overall. Several Porsche 356s were stripped down in weight, and were modified in order to have better performance and handling for these races. A few notable examples include the Porsche 356 SL, and the Porsche 356 A Carrera GT. In the early 1960s Porsche collaborated with Abarth and built the Porsche 356 B Carrera GTL Abarth coupé, which enjoyed some success in motorsports. First Carrera car Number 53456, the first 356 Carrera ever produced (a modified May 3, 1955 exemplar owned by Porsche engineer Reinhard Schmidt as first owner), was analyzed in February