During his teardown of the Model Y,[60] auto analyst Sandy Munro found a component that has been referred to as the "octovalve", which appears to be the next iteration of the superbottle component used in the Model 3.[61] Musk has said that the new heat pump system/octovalve is one of the two most significant changes in the Model Y over the Model 3, the other being the new rear underbody casting.[62] The octovalve supports the Model Y heat pump as part of the car's thermal management system.[63][64]