Ferrari dominated the entry list with 11 cars spreads across both the Sport and GT divisions. The racing division of the company was now entitled Societa Esercizio Fabbriche Automobili e Corse (SEFAC) and it arrived with four cars. Two were the latest iteration of the proven Testarossa race-winner, for their best endurance-racing partnership: Phil Hill / Olivier Gendebien as well as Willy Mairesse with Ferrari-debutante Mike Parkes. There was also the new, very fast, mid-engined Ferrari 246 SP which had already impressed in the season to be driven Ferrari's lead F1 drivers Wolfgang von Trips / Richie Ginther. The 2.4-litre V6 engine developed 270 bhp. The final works entry was a prototype of the new GT car being built for the upcoming 1962 rules changes. It still had the 3-litre V12 engine used in the Testarossa and was driven by Giancarlo Baghetti and Fernand Tavano (who had won the GT-division in the 1960 race as a Ferrari privateer). The North American Racing Team (NART) was also entered, with the TR61 car that had won the Sebring race. It would be driven by the very fast, young, Rodriguez brothers, Pedro and Ricardo Maserati arrived with a new model, the Tipo 63, with a mid-mounted, 3-litre variant of the famous 250F V12 Grand Prix engine. It was said to be capable of 300 kp/h (185 mph) on the Mulsanne Straight. Two were entered by Briggs Cunningham, who had raced it at Sebring and a third for the Scuderia Serenissima, who had run it in the Targa Florio. Camoradi did not send its cars this year. Cunningham himself was entered with Bill Kimberley in a longtail 2-litre T60. Representing Great Britain was Aston Martin and Cooper. Jaguar was a notable absentee for the first time since 1950. The Border Reivers, the only team to break up the Ferrari monopoly at the previous year's results, returned with their DBR1/300. This year Jim Clark was paired with two-time winner Ron Flockhart. His former team, Ecurie Ecosse, ran the new Cooper T57. Running with the 2.6-litre FPF Climax engine it was underpowered on the straights, but excellent handling kept it competitive. Porsche arrived with three of their new RS61 cars, each with a different Flat-four engine. The 2-litre variant now developed 185 bhp with a top speed of 155 mph (250 kp/h). It was driven by Masten Gregory and Bob Holbert. The two coupés were driven