The Zex High Output Nitrous System for '05-present Mustang GTs (PN 82242; $639.99) comes with everything shown. A mechanically capable enthusiast can easily install it in a driveway or garage. Note the small, square box among the components. This is the unit's electronic TPS switch, which activates the system at WOT. While the solenoids and jets are the braun in this setup, the ETPS definitely is the "brain" of the entire operation.