The new Matra 3-litre V12 had its race debut simultaneously in May at the Monaco F1 GP and the Spa 1000 km. Capable of a powerful 380 bhp, the company was initially not going to run at Le Mans, however the deferred date allowed for more testing and a single MS630 longtail was prepared for team drivers Henri Pescarolo and Johnny Servoz-Gavin.