The NXd Stacker Systems are guaranteed to boost horsepower, torque, erase that ugly black smoke cloud and drastically reduce exhaust temperatures. This system includes: 15503 (.157" orifice) Nitrous Solenoid High flow braided stainless lines wide open throttle switch 6AN Feedline Master arming switch Relay and relay harness Jetting for up to 300HP 15Lb nitrous bottle with the Lightning 500 Valve Stainless steel bottle brackets SKU:NXD12002.