Koyo Racing Radiator Cap Blue Type-B 1.3 Bar

Can you handle the pressure?

The Koyorad hyper Radiator Cap is for intelligent tuners who demand to extract every ounce of cooling efficiency from their performance machines. Koyorad highly recommends our 1.3 bar Koyorad Hyper Cap (Koyo part number SK-C13) for use with Koyorad All Aluminum Racing Radiators (when applicable). The Koyorad Hyper Cap is made in Japan with the highest quality components ensuring the best possible performance from your Koyorad Racing radiator. By increasing the coolant pressure and raising its boiling point, the faster your engine is relieved of excessive engine heat. The Hyper Radiator Cap withstands an open valve pressure rating of 1.3kg cm2, adding to under your the hood desire for extra toughness an elegant touch of style.

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 perfromance under ever-changing racing conditions.

Vehicle Fitment:

Type-B Small Radiator Cap Replacement, see below for guide:

Type-A

• 1990-1993 Honda Integra
• 1991-2005 Honda NSX
• 1990-1993 Honda Accord
• 1988-1991 Honda Civic
• 2016-2019 Honda Civic
• 1988-1991 Honda CRX
• 1992-2001 Honda Prelude

• 2003-2008 Infiniti G35
• 2008-up Infiniti G37
• 2014-up Infiniti Q50
• 2014-up Infiniti Q60

• 1992-2000 Lexus SC400

• 1990-1995 Mazda Cosmo
• 1990-2005 Mazda Miata
• 2006-up Mazda MX-5
• 1986-2002 Mazda RX-7
• 2004-2011 Mazda RX-8

• 1991-1999 Mitsubishi 3000GT
• 1990-1999 Mitsubishi Eclipse
• Mitsubishi Lancer/EVO

• 1989-1998 Nissan 180SX
• 1989-1998 Nissan 200SX
• 1989-1998 Nissan 240SX
• 1990-1996 Nissan 300ZX
• 2003-2009 Nissan 350Z
• 2009-up Nissan 370Z
• 2005-up Nissan Frontier
• 2009-up Nissan GT-R
• 1989-2002 Nissan Silvia
• 1989-2002 Nissan Skyline

• 1993-up Subaru Impreza
• 1990-up Subaru Legacy
• 2015-up Subaru WRX STi
• 2015-up Subaru WRX

• 1982-1995 Toyota Celica
• 1985-1995 Toyota MR2
• 1986-1992 Toyota Supra

• Radium Coolant Expansion Tank

Type-B

• 1994-2001 Honda Integra
• 2002-2006 Honda Integra
• 2004-2008 Honda Accord
• 1994-1997 Honda Accord
• 1992-2015 Honda Civic
• 1993-1997 Honda Del Sol
• 2003-2011 Honda Element
• 2007-up Honda Fit
• 2000-2009 Honda S2000

• 2008-up Lexus LX570
• 1998-2005 Lexus IS300

• 2012-up Subaru BRZ

• 2012-up Toyota 86
• 2008-up Toyota Land Cruiser
• 2008-up Toyota Sequoia
• 1993-2002 Toyota Supra
• 2007-up Toyota Tundra