Are you looking to make real power?  Do you have a LSX Engine?  This is what you need.

This Zex Black Out LSX Nitrous System.  This system is specially designed for the LSX engine.  It offers you a tunable 75 - 175 HP gain.  This system comes with everything you need for complete install.  Not only does it come with all that, but since its a zex black out system, it comes with carbon fiber looking hoses, and a zex black nitrous bottle.  

This system features all Zex safety technology.  Active fuel control, which will never let your engine run lean or rich during nitrous use.  Also featuring electronic TPS monitoring.  This will only allow nitrous to be used at wide open throttle.

This is the complete nitrous system for your LSX engine.  You need to have one of these if you want the true way to make after market power.