NOS Dry Nitrous Plate for Holley Gen-V LT Hi-Ram EFI Intake Manifolds - Silver

One-Piece Billet Aluminum Dry Nitrous Plate with Black Anodized Finish

Part # 12538NOS Be the first to write a review
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This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

See Emissions Details
This NOS plate is designed to bolt between the upper and lower intake manifold on Holley Hi-Ram LT Gen-V manifolds. This sandwich-style plate gives you an easy way to add nitrous oxide to your Hi-Ram equipped LT engine. The plate is machined from billet 6061-T6 aluminum, laser etched with NOS logo, then anodized for great looks and excellent corrosion protection. The one-piece plate features machined passages that precisely spray into the center of each cylinder runner. Plate includes jetting for up to 250 horsepower but is capable of supporting 1000+ horsepower. The plate is made from billet aluminum with passages machined directly into the plate so there is no need to worry about spray bars breaking or spinning. Includes NOS plate, gasket, jet holders, and jets.


  • Dry Single Stage Nitrous Plate Sandwiches Between the Bottom Base and Top Plate on Holley Hi-Ram Intake Manifolds
  • Fits Holley Gen-V LT Hi-Ram Intake Manifolds
  • Designed for Optimum Nitrous Distribution on LT Hi-Ram
  • Sprays Nitrous Directly into Each Intake Runner
  • Features Machined 0.103” Passage that Feeds Eight 0.040” Openings per Intake Runner
  • Plate is Made from Billet 6061-T6 Aluminum and has Laser Etched NOS Logo
  • Choose from Clear or Black Anodized Finish – for Corrosion Resistance & Appearance
  • Includes Jetting for 50, 100, 150, 200, and 250 Horsepower Configurations
  • Supports up to 1,000+ Horsepower (with Jets Purchased Separately)
  • Includes Plate, Gasket, Hardware, Jet Holders, and Jetting for up to 250 Horsepower

About NOS

Nitrous Oxide Systems has powered more racers than any other brand of nitrous. When you're looking to go fast, rely on NOS to deliver the most power per dollar available in the industry. From stock engines to race vehicles, jet skis to trucks, NOS has a kit for you.

Bottle IncludedNo
Brackets IncludedNo
Brand NOS
Delivery StyleHi-Ram Plate
Emission Code3
Included Jetting Horsepower50, 100, 150, 200, 250
Jet StyleFlare
Max Horsepower1000
Plate FlangeHolley Hi-Ram
Plate Height1/2 inch
Plate IncludedYes
Product TypeNitrous Plate
System StyleDry
Part Number12538NOS

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

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    Some parts are not legal for use in California or other states with similar regulations.