The ZEX Classic Purple Nitrous System is iconic ZEX. Onlookerswill recognize the infamous purple bottle as yourace past the competition. This Classic Purple System issure to draw attention and have the crowd talking. The ZEX 2003-2006 350Z Nitrous System is the only direct fit nitrous system on the market for thisincredible car. The kit includes a custom designed billet fuel adapter that simply bolts on to the factoryfuel rail. This adapter keeps you fr Adjustable from 55 to 100 HP; perfect for serious performance increases; ZEX Active Fuel Control adjusts fuel enrichment with variations in bottlepressure; so you are never too rich or too lean; ZEX electronics activate the nitrous system only at wide open throttle; Every hose, wire & a custom machined billet fuel rail adapter has been engineeredspecifically for a perfect fit on the 2003-2006 350Z. Fitment: 2003 Infiniti G35 Base 2003 Nissan 350Z Base 2003 Nissan 350Z Enthusiast 2003 Nissan 350Z Performance 2003 Nissan 350Z Touring 2003 Nissan 350Z Track 2004 Nissan 350Z Base 2004 Nissan 350Z Enthusiast 2004 Nissan 350Z Performance 2004 Nissan 350Z Touring 2004 Nissan 350Z Track 2005 Nissan 350Z 35th Anniversary Edition 2005 Nissan 350Z Base 2005 Nissan 350Z Enthusiast 2005 Nissan 350Z Grand Touring 2005 Nissan 350Z Performance 2005 Nissan 350Z Touring 2005 Nissan 350Z Track 2006 Nissan 350Z Base 2006 Nissan 350Z Enthusiast 2006 Nissan 350Z Grand Touring 2006 Nissan 350Z Touring 2006 Nissan 350Z Track