Nitrous Express GEN-X 2 Accessory Package for Integrated Solenoids EFIThe Gen X2 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 X2. We include: NHRA legal safety blow off fitting, Blow down tube, Fuel pressure safety switch., The NX automatic pressure controlled bottle heater will keep your bottle pressure where you need it for bumper dragging launches and killer top end performance. We include a NX