Radiator Caps
Sort by:
Wehrli WCFab Coolant Tank Billet Cap - Black Anodized
$55.49
18-20PSI Replacement Coolant Tank Cap, Black Anodized. Used on WCFab Fabricated Coolant Tanks on 2001+ Duramax or 2004.5-2007 & 2010-2024 6.7L Cummins.
BLOX Racing 12-15 Honda Civic / 2013+ Toyota 86 / 2013+ S...
$40.69
BLOX Racing 12-15 Honda Civic / 2013+ Toyota 86 / 2013+ Subaru BRZ Radiator Cap 1.3 Bar - Type B V2
BLOX Racing 2017+ Honda Civic Type-R / 2002+ Subaru WRX R...
$40.69
BLOX Racing 2017+ Honda Civic Type-R / 2002+ Subaru WRX Radiator Cap 1.3 Bar - Type A V2
GReddy Type-N 1.3 Radiator Cap Most Honda / Some Toyota -...
$40.44
GReddy Type-N 1.3 Radiator Cap Most Honda / Some Toyota - Polished
GReddy Type-S 1.3 Radiator Cap Most Nissan / Subaru / Maz...
$40.44
GReddy Type-S 1.3 Radiator Cap Most Nissan / Subaru / Mazda / Mitsubishi / Some Toyota - Black
GReddy Type-N 1.3 Radiator Cap Most Honda / Some Toyota -...
$40.44
GReddy Type-N 1.3 Radiator Cap Most Honda / Some Toyota - Black
Wehrli 2001+ Chevrolet Duramax/13-18 6.7L Dodge Cummins B...
$55.49
18-20PSI Optional Replacement Coolant Tank Cap, Clear Anodized. Used on WCFab Fabricated Coolant Tanks on 2001+ Duramax or 2004.5-07 & 2010-2024 6.7L Cummins.
HKS 10 Hyundai Genesis Coupe Limited Edition Radiator Cap
$56.70
HKS 10 Hyundai Genesis Coupe Limited Edition Radiator Cap
Gates 93-02 Chevrolet Camaro Safety Release Radiator Cap ...
$28.35
Gates 93-02 Chevrolet Camaro Safety Release Radiator Cap - 18 psiThis Part Fits: Year Make Model Submodel 2001-2005 Cadillac DeVille Base 2001-2005 Cadillac DeVille DHS 2001-2005 Cadillac DeVille DTS 2004-2005...
Gates 90-93 Acura Integra / 90-97 Mazda MX-5 Miata / 03-0...
$34.91
Gates 90-93 Acura Integra / 90-97 Mazda MX-5 Miata / 03-06 Nissan 350Z Radiator Cap - 13 psiThis Part Fits: Year Make Model Submodel 1990-1993 Acura Integra GS 1992-1993 Acura...
Gates Acura / Chevrolet / Ford / GMC / Honda / Infiniti /...
$27.63
Gates Acura / Chevrolet / Ford / GMC / Honda / Infiniti / Mazda / Mitsubishi / Nissan Radiator CapThis Part Fits: Year Make Model Submodel 1990-1993 Acura Integra GS...
Koyo Hyper Radiator Cap - Shallow Plunger Style - Blue Label
$65.90
Koyo Hyper Radiator Cap - Shallow Plunger Style - Blue LabelThis Part Fits: Year Make Model Submodel 2013-2016 Scion FR-S Base 2013-2017 Subaru BRZ Limited 2013-2017 Subaru BRZ Premium 2015...
Koyo Type A Radiator Cap (Red / 1.3 Bar)
$65.90
Red Label: fits all KOYORAD radiators w/ fillernecks(Red) Koyorad Hyper Radiator Cap - Deep Plunger Style
CSF Radiator Cap - Mini Cap 20 psi/ Stant 10361 - Case of 20
$78.41
CSF Radiator Cap - Mini Cap 20 psi/ Stant 10361 - Case of 20
Mishimoto High-Pressure 1.3 Bar Radiator Cap - Small - On...
$42.64
Maximize your Subaru's performance with the Mishimoto High-Pressure 1.3 Bar Radiator Cap. When pushing your vehicle under demanding driving conditions, the cooling system becomes highly pressurized, often exceeding the limits...
Mishimoto High-Pressure 1.3 Bar Radiator Cap Small Non-Di...
$42.64
Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becomes highly pressurized. Stock caps are not...
Cusco High Pressure Type Radiator Cap (Type-A)
$47.29
Cusco High Pressure Type Radiator Cap (Type-A)This Part Fits: Year Make Model Submodel 2016 Mazda MX-5 Miata Club 2016 Mazda MX-5 Miata Grand Touring 2016 Mazda MX-5 Miata Sport 1985-1987...
Mishimoto High Pressure 2.0 Bar Rated Radiator Cap Small
$42.64
Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becomes highly pressurized. Stock caps are not...
Mishimoto 1.3 Bar Rated Carbon Fiber Radiator Cap Small I...
$57.65
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...
Vibrant Radiator Cap for Radiator Filler Neck 20982
$60.69
Vibrant Performance Radiator Caps are specifically designed to fit our Radiator Filler Necks. These Radiator Caps are constructed from 6061 Aluminum and attractively finished in a satin black.Catalog
Skunk2 Honda/Acura/Scion Radiator Cap
$52.27
Skunk2's Fine Tuning products and accessories, like its high-pressure Radiator Caps, help put the finishing touches onto your vehicle you work so hard to make perform well. Skunk2 Radiator Caps...
Vibrant Radiator Cap for Radiator Filler Neck 20980
$59.69
Vibrant Performance Radiator Caps are specifically designed to fit our Radiator Filler Necks. These Radiator Caps are constructed from 6061 Aluminum and attractively finished in a satin black.Catalog
Skunk2 Honda Acura/Mazda/Mitsubishi/Subaru Radiator Cap
$52.27
Skunk2's Fine Tuning products and accessories, like its high-pressure Radiator Caps, help put the finishing touches onto your vehicle you work so hard to make perform well. Skunk2 Radiator Caps...
Radium Engineering Radiator Cap Type-A 1.5 Bar - Black
$45.14
Radium Engineering Radiator Cap Type-A 1.5 Bar - Black
Radium Engineering Radiator Cap, Typ-A 1.3Bar - Black
$45.14
Radium Engineering Radiator Cap, Typ-A 1.3Bar - Black
Radium Engineering Radiator Cap Type-A 1.1Bar Black
$45.14
Radium Engineering Radiator Cap Type-A 1.1Bar Black
QuadBoss 14-15 Polaris ACE 325 Radiator Cap
$54.68
QuadBoss® Radiator Caps are a direct O.E.-replacement, automotive-style cap.This Part Fits: Year Make Model Submodel 2004-2005 Polaris ATP 500 Base 2000-2001 Polaris Diesel (455cc) Base 2001-2004 Polaris Sportsman 400 Base...
QuadBoss 06-17 Arctic Cat 1000 4x4 Radiator Cap
$54.68
QuadBoss® Radiator Caps are a direct O.E.-replacement, automotive-style cap.This Part Fits: Year Make Model Submodel 1998-2002 Arctic Cat 400 4x4 Base 1998-2009 Arctic Cat 500 4x4 Base 2009 Arctic Cat...
Mishimoto 1.3 Bar Rated Radiator Cap Large Domestic
$42.64
Getting the most out of your performance parts comes down to the details.When faced with hard driving conditions, a vehicle's cooling system becomes highly pressurized.OEM caps are not equipped to...
Mishimoto High Pressure 1.3 Bar Rated Radiator Cap Small
$42.64
Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becomes highly pressurized. Stock caps are not...
Mishimoto 1.1 Bar Rated 99-15 Ford F-250/F-350/F-450/F-55...
$32.64
Getting the most out of your performance parts comes down to the details. When faced with hard driving conditions, a vehicle's cooling system becomes highly pressurized. Factory caps are not...
Upgrade your ride with premium cooling components from Bull Strap. This collection of radiators is designed to keep your engine running at optimal temperature. Every product in our Radiator Caps lineup has been selected to deliver uncompromising quality and performance.
At Bull Strap, we understand that your vehicle is more than just transportation — it's a reflection of your lifestyle. That's why we stock only the best cooling components, sourced from industry-leading manufacturers known for durability and precision engineering. Whether you're building a daily driver or a weekend trail rig, you'll find exactly what you need.
Browse our full selection below and find the perfect fit for your build. Bull Strap offers fast shipping, expert support, and competitive pricing on every order. Have questions? Our team is here to help you choose the right parts for your vehicle.