Et oui ,suite à de gros problèmes X avaite été fermé il ya a quelque temps, il avait été arrêté pour une durée indéterminée.
Pour remédier à ces probléme sixflag à demandé à S&S de construire de nouveaux trains , ils utilisent les mêmes matériaux des trains de Eejanaika ! Donc ils seront plus légé et plus confortable !

Article en anglais (source Coaster Force ) :
In 2001, Six Flags Magic Mountain began to be known as "The X-treme Park!" after the addition of four new roller coasters throughout 2000 and 2001. The first being the duo Goliath and Goliath Jr., a Giovinola Hyper coaster and a refurbished kids coaster respectively. Following the addition of the Goliaths, the west coast's first Super Invertigo roller coaster, Deja Vu. Last but not least was the world's first "Fourth Dimension" roller coaster, X, a project Magic Mountain and Arrow Dynamics have been working on for years. The concept of spinning head over heels while going through dips and twists have always been an engineering marvel and giving riders baffled looks. After years of hard work, X finally opened to season pass holders as a Christmas present on December 24th, 2001. But downtime has been constant and months later, in June 2002, X was closed down for redesigning and tweaks. Expected in a prototype ride, however, Magic Mountain was furious at Arrow Dynamics for the amount of bugs in X's designs. So much, that a ride originally costing $6.6 million increased to $17 million. X finally reopened on August 13th, 2002, and since then has caused more trouble for the park. The ride has become so troublesome, that Six Flags even hired its own maintainence team and engineers just for X.
In late 2002, Six Flags and Arrow Dynamics began to fight it out in court due to the rising costs of running X. The conflict was finally solved in 2003, with Magic Mountain being the victor. At the cost of Six Flags' victory came the death of a great American coaster company, Arrow Dynamics Inc, known for bringing many common amusement park rides to life with the invention of the tubular steel coaster and roller coaster inversion. However, Arrow was later acquired by Stan Checketts' S&S Power Inc. Since then, the X fiasco has made the 4-D coaster unpopular among parks until one Japanese park was ready to try out the concept again. At IAAPA 2005, S&S Arrow announced they have sold a 4-D coaster to Fuji-Q Highland in Japan. Throughout the years after the X incidents, the 4-D concept has been tweaked and re-engineered and have been implemented into Fuji-Q Highland's newest coaster Eejanaika.
In recent days, X has closed down for maintainence again, but recently reopened last weekend. However, soon enough, X will close down again fora good reason, new trains. The park has hired S&S to build new trains for X, which uses the technology and materials used by Eejanaika. The new trains hope to provide X with lighter trains and a smoother ride. The park hopes X's improvements would ease the problems of the ride.
Six Flags Magic Mountain has no plans for new thrill rides aside from the removal of two disliked roller coasters, Flashback and Psyclone.
Source: LA Daily News