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.
LED Blue Replacement For Ntimidator™ Illuminated LED Nitrous Purge Kit
- Bright Blue LED
- Replacement or Upgrade
Blue LED upgrade only for 16030NOS & 16032NOS