Radiator Caps

Even when coolant begins to heat up, pressure begins to build inside the radiator.  BLOX Racing’s high pressure radiator caps ensure that this pres...

Chase Bays high performance radiator caps are engineered to improve cooling efficiency. The radiator cap is an essential part of an upgraded coolin...

Circuit Hero high pressure radiator cap uses a 1.3 kgf/cm² spring to increase your coolant/antifreeze boiling point and protect your engine.An adde...

Enhance the look of your engine bay and keep your cooling system functioning properly with the stylish new CorkSport Radiator Cap. Designed to orig...

Enhance the look of your engine bay and keep your cooling system functioning properly with the stylish new CorkSport Radiator Cap. Designed to orig...

Raise the boiling point of your coolant for increased cooling efficiency and prevention of over heating with the Cusco High Pressure Radiator Cap. ...

D1 SPEC Thermostatic Gauge Radiator Cap 1.3bar. Made of billet aluminum material for strength and durability, combines your radiator cap with a tem...

*sold individually*Show your HKS pride and let the real racers know you mean business with the Limited Edition D1 Radiator Cap.

The cooling system of your car is one of the most important parts, without one your engine would be useless in minutes. Many people change the cap...

K-Tuned High Pressure Rad Caps were designed specifically to end the confusion over which cap is used with our upper coolant neck filler option...

Extract every ounce of cooling efficiency from Koyorad All Aluminum Performance Radiators with a genuine Koyorad Hyper Cap!  This Koyorad Hyper Cap...

Extract every ounce of cooling efficiency from Koyorad All Aluminum Performance Radiators with a genuine Koyorad Hyper Cap!  This Koyorad Hyper Cap...

Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becom...

Mishimoto has developed a carbon fiber radiator cap to enhance the style of your engine bay while maintaining the pressure in your cooling system. ...

Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becom...

Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becom...

Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becom...

We are proud to introduce the PRL Motorsports High-Performance 1.3 Bar Radiator Cap—a must-have upgrade for those seeking better cooling performanc...

We are proud to introduce the PRL Motorsports High-Performance 1.3 Bar Radiator Cap—a must-have upgrade for those seeking better cooling performanc...

Please confirm what style your application uses prior to ordering.  NOTE: Radium Engineering coolant expansion tanks require a Type-A style radiato...

Skunk2's Fine Tuning products and accessories, like its high-pressure Radiator Caps, help put the finishing touches onto your vehicle you work so ...

Skunk2's Fine Tuning products and accessories, like its high-pressure Radiator Caps, help put the finishing touches onto your vehicle you work so h...

Our high-performance radiator cap will not only improve the appearance of your vehicle’s engine bay, but it will also play a vital role in improvi...

Our high performance radiator cap will not only improve the appearance of your vehicle’s engine bay, but it will also play a vital role in improvin...

The STM Custom Water Necks feature a welded top spout for the radiator cap and are designed for race applications where the radiator may be relocat...

Tegiwa Fine Tuning products and accessories, like its high-pressure Radiator Caps, help put the finishing touches onto your vehicle you work so ha...

Domestic Standard - 16 psi  (SAE Range 14-18 psi) - Shown/ Import Standard - 13 psi  (SAE Range 11-15 psi) - Not Shown  Std. Pressure Cap - Open o...