NOS The NOS "Plate Only" kit allows our customers to build a custom nitrous system for their 6.4L Gen III Hemi powered muscle car with a 80mm throttle body. This slim design is only 1/2" thick at the throttle body mounting flange. This allows maximum room forward of the throttle body to clear accessory drives, tensioner brackets or other obstacles that may interfere with a more forward mounted throttle body.