Check the listing for details. NX917 Nitrous Express 112mm Adapter Plate Conversion (100-400HP). Color: Black, Condition: New. Listed at 415.51 USD. NX917 Nitrous Express 112mm Adapter Plate Conversion (100-400HP) Description: If you have upgraded your throttle body to a 112 mm and are looking to add nitrous to your vehicle, nitrous express now has a bolt on solution without the need for additional adapters or spacers. The 112mm adapter plate system uses 2 separate bolt patterns, one for the intake and separate one for the throttle body. This plate takes the popular 4 bolt LS throttle body bolt pattern and adapts the flange to accept a 112mm throttle body. The conversion comes as a single stage wet nitrous plate and includes jetting for 100-400 horsepower. Shipping 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.