Part # SK-C13 (RED label) Deep plunger fits all Koyorad radiators w/ filler necks
Part # SK-D13 (BLUE label) Shallow plunger
Extract every ounce of cooling efficiency from Koyorad All Aluminum Performance Radiators with a genuine Koyorad Hyper Cap! This Koyorad Hyper Cap withstands an increased valve pressure rating of 1.3kgf/cm2 (1.3 bar) (18.9 psi) (130 kPa) which increases the boiling point of water and relieves high performance engines of excessive heat. A genuine Koyorad Hyper Cap is recommended for use with every Koyorad All Aluminum Performance Radiator (when applicable). This Koyorad Hyper Cap is manufactured in Japan from high quality components to ensure longevity and performance from your Koyorad Racing radiator. Why is increased Pressure Better?
It’s simple. When water is pressurized, its natural boiling point is increased. Most modern vehicles are equipped with a 0.9 Bar pressure cap. 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.
Koyorad
Koyorad is a Japanese company established in July of 1956 as Ejiri Radiator in Nagoya, Japan (Aichi Prefecture) as a radiator repair shop. Twelve years later in 1968, Ejiri Radiator established a radiator and oil cooler factory in Nagoya. We then separated our production facilities from our repair facilities and began manufacturing radiators. Two years later in 1970, Ejiri Radiator was renamed to Koyo Radiator Manufacturing and began expanding to branches all over Japan. Koyorad quickly developed into an industry leading Aftermarket Radiator Supplier worldwide. With over 57 years of radiator design and manufacturing experience, founder Mr. Ejiri and son soon gained interest in automotive racing.
Officially launched in 1999 in Japan, Koyorad Racing Radiators soon made a presence in Japan’s ever popular racing scene. Koyorad Racing Radiators soon became synonymous with Koyo’s High Quality Aftermarket Radiators. As Koyorad Racing Radiators grew in reputation for quality and performance, so did the company’s desire to expand. In 2004, Koyorad Racing Radiators made it’s US debut. What started as a few racing applications for Japanese vehicles in 2004 has now in 2013 grown to over 80 models for Japanese, US Domestic, and Korean vehicles.
