Product Brief
The genuine Koyorad Hyper Cap (Part # SK-C13) is made in Japan and is the recommended cap for every Koyorad All Aluminum Performance Radiator. It is rated at 1.3 bar, compared with the 0.9 bar cap on most modern vehicles. The higher pressure raises the coolant's boiling point, so high-performance engines can shed excess heat under changing race conditions.
Key Features
- 1.3 Bar Pressure Rating: 1.3 kgf/cm² / 18.9 psi / 130 kPa, up from the 0.9 bar typical of most modern vehicles.
- Higher Boiling Point: Raises coolant boiling temperature to 267.8°F (131°C), nearly 56°F above water's normal boiling point.
- More Cooling Headroom: Gives the cooling system extra heat capacity under changing racing conditions.
- Deep Plunger Design: Fits all Koyorad radiators with filler necks.
- Koyorad-Specific Fit: Designed for Koyo radiators only.
- Made in Japan: Built from high-quality components for long life and reliable performance.
