GFB 5901 BOV Seal Kit – Skyline Flange Valves

The GFB 5901 BOV Seal Kit by Go Fast Bits is a genuine replacement sealing kit designed specifically for blow-off valves that use the Nissan Skyline flange pattern.

Ideal for maintenance or rebuilds, this kit helps restore a proper seal between the BOV and mounting flange, ensuring reliable boost performance and preventing leaks.

🔧 GFB 5901 BOV Seal Kit – Skyline Flange Valves Key Features & Benefits

• Direct Replacement Seal Kit – Designed for Skyline flange BOV applications
• Restores Proper Sealing – Prevents boost leaks and pressure loss
• Improves BOV Performance – Ensures correct valve operation under boost
• Genuine GFB Part – Precision fit and reliable sealing
• Simple Installation – Ideal for servicing or rebuilding valves

🚗 Compatibility (Verified)

• Suits GFB blow-off valves with Nissan Skyline flange mounting
• Commonly used on:
  • Skyline-style flange setups (RB engines / aftermarket piping)
• Fits valves requiring Skyline flange gasket/seal replacement

✔ Note: This is a seal kit only — not a flange or valve

⚙️ Product Overview

Over time, BOV seals can:

• Harden
• Wear
• Develop leaks

The GFB 5901 seal kit is designed to refresh the sealing surface, helping maintain:

• Stable boost pressure
• Proper valve response
• Leak-free operation

This makes it essential for:

• Routine maintenance
• High-boost applications
• Rebuilding older GFB valves