Nitrous Express GEN-X Accessory Package EFIThe Gen X package includes the best accessories for your EFI nitrous system all put into one package. No need to mix and match parts, get everything you need with just the Gen X. We include a NHRA legal safety blow off fitting, blow down tube and a fuel pressure safety switch to keep you and the car safe. The NX automatic pressure controlled bottle heater will keep your bottle pressure where you need it for bumper dragging launches and killer top end