Koyo 1.3 Bar High Pressure Hyper Radiator Cap
- All Koyo Aluminum Radiators with Fill Necks and most Aftermarket Radiators
- 2003-2006 Mitsubishi Lancer Evolution VIII-IX
- 2008-2015 Mitsubishi Lancer Evolution X
- 1990-1999 DSM (Mitsubishi Eclipse GST & GSX, Talon TSi & Laser Turbo)
- 2002+ Subaru WRX & STi
Koyorad’s Hyper Cap is rated at 1.3 Bar which increases the boiling temperature of your coolant to 267.80 degrees Fahrenheit. That is nearly a 56 degree increase over water's normal boiling point. By increasing the boiling point of water, an engine's cooling system will have the added heat capacity, maximizing performance under ever-changing racing conditions.