The primary purpose of a purge valve is to release trapped air or gaseous nitrous from feed line(s). Helps to ensure consistent performances.

And it looks cool, too. You've probably seen the Import or Pro Mod guys do it.

Includes all required components.

• Unique Kit Uses 2 Bright Blue LED lights
• Illuminates a 4 feet. Plume of Nitrous
• Strikes Fear into Nighttime Competitors
• Install Easily w/ Common Hand Tools
• Fits All Nitrous Kits w/-4 AN Feed Line

Details:

• Emission Code: 4
• Hose Size: 4AN
• LED Color: Blue
• LED Qty: 2
• Solenoid: Super PowerShot
• Warranty: Manufacturer's Limited 90 Day Warranty