GReddy Type-S No-Relief Radiator Cap | 13911010

GReddy Type-S No-Relief Radiator Cap | 13911010

Complete your performance cooling system with the GReddy Type-S No-Relief Radiator Cap in a polished finish. Designed for applications using a GReddy radiator breather tank or compatible cooling system configuration, this solid radiator block-off cap provides a sealed connection without a conventional pressure-relief valve.

Unlike standard radiator caps that regulate cooling system pressure, this no-relief design is intended to seal the radiator filler neck while pressure regulation is handled by the appropriate external breather tank system. Its polished finish and signature GReddy branding provide a clean, performance-inspired appearance for custom engine bays and upgraded cooling systems.

Designed for compatible Type-S radiator filler necks, this cap is commonly associated with Nissan, Subaru, Mazda, Mitsubishi, and select Toyota applications. Proper cooling system configuration is essential before installation.

Key Features

• Genuine GReddy Type-S radiator block-off cap
• Solid construction with no pressure-relief valve
• Polished finish with GReddy branding
• Designed for compatible radiator breather tank systems
• Type-S radiator filler neck compatibility
• Includes an additional GReddy badge
• Ideal for custom and upgraded performance cooling systems
• GReddy part number 13911010

Technical Specifications

• Manufacturer: GReddy / TRUST
• Product Type: Radiator Block-Off Cap
• Cap Style: Type-S
• Finish: Polished
• Pressure Relief: None
• Application: Compatible radiator breather tank systems
• Manufacturer Part Number: 13911010

Vehicle Applications

The GReddy Type-S cap design is commonly used with compatible cooling systems found on select Japanese performance vehicles, including:

• Nissan performance applications
• Subaru performance applications
• Mazda performance applications
• Mitsubishi performance applications
• Select Toyota applications
• Custom cooling systems using compatible Type-S radiator filler necks

Vehicle compatibility depends on the radiator filler neck and cooling system configuration. A compatible Type-S filler neck alone does not establish that a no-relief cap is appropriate for your vehicle.

Important Installation Information

Warning: This is a solid radiator block-off cap without a pressure-relief valve. It is intended for cooling systems specifically designed to use an external breather tank or another appropriate pressure regulation arrangement.

Do not install this cap as a direct replacement for a conventional pressure-relief radiator cap unless your cooling system has been designed for this configuration. Improper installation may result in excessive cooling system pressure, coolant leaks, or damage to cooling system components.

GReddy notes that installation may feel tighter than the factory cap on some aftermarket aluminum radiators. Apply downward pressure while turning the cap to help engage the filler neck correctly.

What's Included

• One GReddy Type-S Polished No-Relief Radiator Cap
• One additional GReddy badge

Why Buy GReddy from JD Customs USA?

JD Customs USA offers genuine GReddy performance products for enthusiasts building and maintaining high-performance Japanese vehicles. Selecting the correct radiator cap and cooling system components is essential, especially when upgrading to aftermarket radiators, breather tanks, or custom cooling configurations.

Our team provides detailed product specifications and knowledgeable enthusiast support to help customers understand compatibility and installation requirements before ordering. Whether you're upgrading a Mitsubishi Evo, Nissan Skyline, Subaru WRX, or another performance platform, JD Customs USA is a trusted source for GReddy cooling system accessories and performance components.

• Genuine GReddy performance products
• Accurate manufacturer part numbers and specifications
• Support for Japanese performance vehicle applications
• Knowledgeable assistance with cooling system components
• Secure ordering from an established performance parts retailer