Check the listing for details. NX618 Nitrous Express Billet Crossbar Plate Conversion 100-500Hp (4500 Flange). Color: Black, Condition: New. Listed at 630.16 USD. NX618 Nitrous Express Billet Crossbar Plate Conversion 100-500Hp (4500 Flange) Description: The new NX Billet Crossbar nitrous plate systems have just raised the bar in nitrous plate technology. The CNC machined design eliminates round spray bars resulting in excellent atomization and cylinder distribution. With no spray bars to sag, rotate or disrupt airflow, this is truly the Next Generation in cross bar nitrous plate technology. This crossbar nitrous conversion includes: Billet aluminum crossbar nitrous plateStainless fittingsCustom solenoid bracketBraided stainless solenoid to plate linesNitrous/fuel jets for 100, 200, 300, 400, and 500HP.Longer carb studs.Carburetor to plate gasketsShipping is FREE inside the contiguous United States. If shipping to Alaska, Hawaii or Puerto Rico please message us for a quote for additional shipping costs.