ZEX Nitrous System Dual PlateUntil recently, nitrous systems for dual 4 barrel intake manifolds have consisted of a couple of plates bolted under the carburetors, equipped with crudebrass spray bars to inject nitrous and fuel into the intake charge. Delivery Style: Dual square bore plate Nitrous System Style: Wet Nitrous System Intended Fuel Type: Gasoline Maximum Advertised Horsepower Increase: 300 Activation: TPS Jet Sizes Included (hp): 150, 200, 250, 300 Bottle Included: Yes