NOS' new nitrous solenoids feature a new proprietary plunger material that resists swelling, yet seals as good as a Viton type material. The nitrous solenoids also feature a new blue powder coated housing where the new NOS fuel solenoids feature a red powder coated housing for easy identification and good looks. All NOS solenoids also feature stainless steel bases with the NOS logo stamped in so you know it is a quality NOS solenoid.
