Nitrous Express 20940-10 Holley Hi-Ram Plenum Plate System w/10lb Bottle

Vehicle Fitment

• Engine application - not vehicle-specific. Fits any engine equipped with a Holley Hi-Ram intake manifold

Fitment Notes

• Requires a Holley Hi-Ram intake manifold - not compatible with other intake manifold styles
• Advertised horsepower range varies by source: 400 HP max per one listing's spec field, up to 500 WHP per included jetting per others - confirm exact power range with Nitrous Express for your combination

Features

• Plenum plate bolts directly between the upper and lower Holley Hi-Ram intake manifold halves for a clean, integrated install
• Nitrous and fuel passages are machined directly into the billet aluminum plate - no spray bar or nozzle to break or spin
• Injects nitrous and fuel into each cylinder from the side of the runner for direct-port-style distribution
• Billet aluminum and carbon fiber Lightning solenoids for consistent, reliable activation
• Stainless steel braided lines included for durable, high-pressure plumbing
• Microswitch activation
• Single-stage system with a full range of jets included for tuning flexibility

Specifications

• Delivery style: Intake spacer/plenum plate
• System style: Wet, single stage
• Fuel type: Gasoline
• Activation: Microswitch
• Jet sizes included: 75, 100, 150, 200, 250, 300, 350, 400 HP
• Plate material: Billet aluminum

Included Components

• 1x Billet Aluminum Plenum Plate
• 1x 10 lb. Aluminum Nitrous Bottle, White
• Stainless Steel Bottle Brackets
• Lightning Solenoids (Billet Aluminum/Carbon Fiber)
• Stainless Steel Braided Lines
• Wiring and Switches
• All Mounting Hardware

Product Description

The Nitrous Express 20940-10 is a complete nitrous system built specifically to take advantage of a Holley Hi-Ram intake manifold's design. The billet aluminum plenum plate bolts directly between the upper and lower manifold halves, with nitrous and fuel passages machined straight into the plate rather than relying on a separate spray bar or nozzle - eliminating a common failure point on other plate-style systems.

Nitrous and fuel are injected into each cylinder from the side of the runner, giving distribution closer to a true direct-port system without the added complexity. The kit includes Nitrous Express's billet aluminum and carbon fiber Lightning solenoids, stainless steel braided lines, and a full range of jets covering roughly 75 to 400+ horsepower, so the system can be tuned across a wide power band as the build evolves.

This is a complete kit rather than a standalone plate - it ships with a 10 lb. aluminum nitrous bottle, stainless steel bottle brackets, wiring, switches, and every fitting needed for installation. It's built for engine builders running a Holley Hi-Ram manifold who want a clean, integrated nitrous solution rather than piecing together a spray bar system separately.