GReddy Profec B Spec 2 4mm In-Line Filter

SKU: 15900011

GReddy Profec B Spec II 4mm In-Line Boost Control Solenoid Filter

The GReddy 15900011 4mm in-line filter is a direct replacement for the factory filter used in Profec B Spec II electronic boost controllers. Designed to protect the boost solenoid from debris, moisture, and oil contamination, this small but critical component ensures reliable solenoid operation and consistent boost control on high-performance turbocharged engines.

Key Features

• 4mm Push-to-Connect Fittings: Direct fit for GReddy Profec B Spec II vacuum lines.
• High-Flow Sintered Filter Element: Traps contaminants while maintaining boost signal integrity.
• Transparent Body: Allows visual inspection for clogging or contamination.
• Compact Size: Easy installation in tight engine bays.
• Prevents Solenoid Failure: Essential for long-term reliability of electronic boost control.
• Made in Japan: Manufactured by Trust/GReddy to OEM quality standards.

Product Notes

• Part number: 15900011 (Profec B Spec II replacement filter).
• Direct replacement for the original filter included with Profec B Spec II kits.
• 4mm OD vacuum line compatible (common on most boost control solenoids).
• Recommended replacement every 2-3 years or when solenoid issues occur.
• Weight approximately 15 grams.

Installation Notes

• Push-to-connect design simply push vacuum lines onto barbs (no tools required).
• Install in-line between boost source and solenoid (arrow indicates flow direction).
• Typical install time < 5 minutes.

This Part Fits

Universal – fits any GReddy Profec B Spec II boost controller and similar 4mm solenoid setups:

Application	Common Vehicles
GReddy Profec B Spec II	All vehicles using Profec B Spec II controller
Boost Solenoid Protection	Subaru WRX/STI, Mitsubishi Evo, Nissan SR20/RB, Toyota 2JZ/3SGTE
Custom Boost Control	Any 4mm vacuum line solenoid application

Why Choose GReddy Profec Accessories?

• Original replacement parts for the legendary Profec B Spec II boost controller.
• Prevents costly solenoid failure from contaminated boost reference lines.
• Trusted by professional tuners for reliable boost management.

Frequently Asked Questions

• Q: Is this required for Profec B Spec II?
  A: Yes, factory filter should be replaced periodically this is the exact OEM replacement.
• Q: Can I clean the old filter?
  A: Not recommended contaminants embed in sintered element replacement is best.
• Q: Does flow direction matter?
  A: Yes, arrow on body indicates correct flow from boost source to solenoid.

Shipping & Handling

• Method: Standard ground shipping.
• Package Weight: Approximately 0.5 lbs.
• Box Dimensions (approx): 6″ × 4″ × 2″.