Koyo Hyper Radiator Cap

Fits All Koyo Aluminum Racing Radiators

SKC-13

Overview:

The Koyo Hyper Radiator Cap SK-C13 is an essential upgrade designed specifically for use with all Koyo Aluminum Racing Radiators. Engineered for performance enthusiasts and tuners who demand maximum cooling efficiency, this radiator cap increases the coolant system pressure, which raises the boiling point of the coolant. This means your engine can operate at higher temperatures without overheating, allowing for better heat management during spirited driving or track use.

By installing the Koyo Hyper Radiator Cap, you ensure your high-performance or racing engine is better protected from excessive heat buildup, improving reliability and maintaining optimal operating temperatures under demanding conditions. This cap is a perfect match for Koyo’s aluminum radiators, combining functionality with a stylish red finish that adds a subtle performance aesthetic under the hood.

Key Features:

The Koyo Hyper Radiator Cap offers several technical advantages that make it a must-have for anyone running a Koyo Aluminum Racing Radiator:

• Designed exclusively for Koyo Aluminum Racing Radiators with a micro cap filler neck for perfect fitment.
• Increases coolant system pressure to 1.3 kg/cm² (approximately 18.5 psi), raising the coolant boiling point for improved heat tolerance.
• Helps prevent coolant boil-over during high RPM or high load conditions, enhancing engine cooling efficiency.
• Durable construction engineered to withstand rigorous racing and performance driving environments.
• Bright red finish adds a clean, performance-oriented look to your engine bay.
• Simple bolt-on installation with no modifications required when paired with compatible Koyo radiators.
• Essential for tuners and enthusiasts seeking to maximize cooling system performance and engine longevity.

Construction & Design:

The Koyo Hyper Radiator Cap is precision-engineered to meet the demands of high-performance cooling systems. Its robust design ensures a reliable seal and consistent pressure retention, critical for maintaining elevated coolant pressure and preventing premature boiling. The cap’s materials and build quality are optimized for durability and heat resistance, making it suitable for racing and aggressive street applications.

Its compatibility with Koyo’s micro cap filler neck radiators ensures a secure fit and leak-free operation, while the red anodized finish provides corrosion resistance and a visually appealing upgrade to your cooling system components.

Installation & Fitment:

This radiator cap is designed as a direct replacement for the factory cap on all Koyo Aluminum Racing Radiators equipped with a micro cap filler neck. Installation is straightforward and requires no special tools or modifications. Simply remove the existing radiator cap and install the Koyo Hyper Radiator Cap to immediately benefit from increased coolant pressure and improved thermal management.

• Direct bolt-on replacement for Koyo Aluminum Racing Radiators.
• No cutting, drilling, or special tuning required.
• Compatible only with radiators featuring a micro cap filler neck.

What's Included:

• One Koyo Hyper Radiator Cap SK-C13 (Red)

Ideal For:

The Koyo Hyper Radiator Cap is ideal for:

• Performance enthusiasts upgrading to Koyo Aluminum Racing Radiators.
• Tuners seeking enhanced cooling efficiency and higher coolant boiling points.
• Track day drivers and racers who push their engines to high RPMs and loads.
• Anyone looking to improve engine heat management and reliability under demanding conditions.

Koyorad (Koyo) builds cooling system upgrades, including application-specific aluminum performance radiators designed to improve heat rejection for hard-driven street and track vehicles. It’s a trusted choice for boosted and high-revving builds where controlling coolant temps is critical to consistent power and reliability.

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