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The radiator cap is a small but important component of your vehicle’s cooling system. When functioning properly, the cap keeps contaminates and excess air out of your...
The radiator cap is a small but important component of your vehicle’s cooling system. When functioning properly, the cap keeps contaminates and excess air out of your cooling system. Excess air in the system reduces cooling efficiency and can lead to problems like engine overheating.
Most radiator caps for modern applications are designed to let a specified amount of pressure build in the system as the coolant heats up and expands. If the system’s pressure exceeds the specified radiator cap pressure, a valve in the cap opens to let coolant flow into the coolant reservoir. As the coolant temperature decreases and the system...
The radiator cap is a small but important component of your vehicle’s cooling system. When functioning properly, the cap keeps contaminates and excess air out of your cooling system. Excess air in the system reduces cooling efficiency and can lead to problems like engine overheating.
Most radiator caps for modern applications are designed to let a specified amount of pressure build in the system as the coolant heats up and expands. If the system’s pressure exceeds the specified radiator cap pressure, a valve in the cap opens to let coolant flow into the coolant reservoir. As the coolant temperature decreases and the system pressure drops, the cap allows the coolant to return to the main cooling system. For added safety, some caps come equipped with pressure-release levers to vent excess pressure before the cap is removed.
If you’re experiencing cooling problems, you may want to start with a new radiator cap. We have you covered with a wide selection of stock replacement radiator caps for just about anything you drive. We also carry radiator caps with built-in temperature gauges so you know just what’s happening inside your cooling system. When it’s time to upgrade to an aftermarket aluminum radiator, top it off with a billet aluminum radiator cap in a variety of eye-catching finishes such as natural, chrome, polished, and anodized colors to complement your engine bay.
You can shop radiator caps with pressure ratings from 0 to 42 psi in a variety of styles from trusted brands like Stant, Moroso, Be Cool, Meziere, and more. And remember, everything we sell is backed by the best customer service in the industry.
Radiator Cap, Steel, Hexagon, Moroso Logo, 19-21 psi, Each
Part Number: MOR-63320
Estimated Ship Date: Monday 4/28/2025
Estimated Ship Date: Monday 4/28/2025
COOLANT CAP BILLET SCALLOPED STYLE 16 PSI
Part Number: CTR-81-216
Not Yet Reviewed
Estimated Ship Date: Monday 4/28/2025
Estimated Ship Date: Monday 4/28/2025
Radiator Cap, Aluminum, Natural, Octagon, Stant, 38-42 psi, Each
Part Number: FLD-S0004
Not Yet Reviewed
Estimated Ship Date: Jun 30, 2025 if ordered today
Estimated Ship Date: Jun 30, 2025 if ordered today
hybrid-racing-performance-radiator-cap-c
Part Number: HYB-HYBRAC0103
Not Yet Reviewed
Estimated Ship Date: May 19, 2025 if ordered today
Estimated Ship Date: May 19, 2025 if ordered today
Radiator Cap, Aluminum, Natural, Octagon, Stant, 23-27 psi, Each
Part Number: FLD-S0003
Not Yet Reviewed
Estimated Ship Date: Jun 27, 2025 if ordered today
Estimated Ship Date: Jun 27, 2025 if ordered today
Radiator Cap, Notch Grip, Round, 20 psi Maximum Pressure, Aluminum, Black Powder Coat
Part Number: CHH-3300-007B
Not Yet Reviewed
Estimated Ship Date: May 6, 2025 if ordered today
Estimated Ship Date: May 6, 2025 if ordered today
Radiator Cap, Notch Grip, Round, 7 psi Maximum Pressure, Aluminum, Chrome Plated
Part Number: CHH-3300-006C
Not Yet Reviewed
Estimated Ship Date: May 6, 2025 if ordered today
Estimated Ship Date: May 6, 2025 if ordered today
Radiator Caps, Dorman, Direct Replacement, 16 psi. Maximum Pressure, Steel, Natural Finish, fits 39 mm Filler Neck, Mazda, Each
Part Number: RNB-54237
Estimated Ship Date: Monday 4/28/2025
Estimated Ship Date: Monday 4/28/2025
HEX RADIATOR CAP,27-29 LB.
Part Number: KYS-10015503
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
Radiator Cap, Notch Grip, Round, 20 psi Maximum Pressure, Aluminum, Chrome Plated
Part Number: CHH-3300-007C
Not Yet Reviewed
Estimated Ship Date: May 6, 2025 if ordered today
Estimated Ship Date: May 6, 2025 if ordered today
hybrid-racing-performance-radiator-cap-c
Part Number: HYB-HYBRAC0104
Not Yet Reviewed
Estimated Ship Date: May 19, 2025 if ordered today
Estimated Ship Date: May 19, 2025 if ordered today
Radiator Cap
Part Number: SNN-1008-16
Not Yet Reviewed
Estimated Ship Date: May 5, 2025 if ordered today
Estimated Ship Date: May 5, 2025 if ordered today
CV4 by Wiseco Radiator Cap, 1.4 BAR, 20 PSI
Part Number: CV4-CV715-20M
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
CV4 by Wiseco Radiator Cap, 2.0 BAR, 31 PSI
Part Number: CV4-CV715-29MK
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
CV4 by Wiseco Radiator Cap, 2.0 BAR, 31 PSI
Part Number: CV4-CV715-31M
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
CV4 by Wiseco Radiator Cap, 2.0 BAR, 31 PSI
Part Number: CV4-CV715-31MK
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
SAFE CAP - 25LB - NICKEL
Part Number: MEZ-WCC308
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
CAP ASY - RADIATOR
Part Number: MOF-XS6Z8100A
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
HEX RADIATOR CAP,19-21 LB.
Part Number: KYS-10015501
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
HEX RADIATOR CAP,23-25 LB.
Part Number: KYS-10015502
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
HEX RADIATOR CAP,31-33 LB.
Part Number: KYS-10015504
Not Yet Reviewed
Estimated Ship Date: Apr 28, 2025 if ordered today
Estimated Ship Date: Apr 28, 2025 if ordered today
1960-70 Falcon, Comet. 1965-66 Mustang; Radiator Cap; 14 lb; OEM Style Zinc
Part Number: OER-8100B
Not Yet Reviewed
Estimated Ship Date: Sep 3, 2025 if ordered today
Estimated Ship Date: Sep 3, 2025 if ordered today
Radiator cap
Part Number: SNN-1002-05
Not Yet Reviewed
Estimated Ship Date: May 5, 2025 if ordered today
Estimated Ship Date: May 5, 2025 if ordered today
HD Radiator cap
Part Number: SNN-1002-07
Not Yet Reviewed
Estimated Ship Date: May 5, 2025 if ordered today
Estimated Ship Date: May 5, 2025 if ordered today
Radiator cap
Part Number: SNN-1007-09
Not Yet Reviewed
Estimated Ship Date: May 5, 2025 if ordered today
Estimated Ship Date: May 5, 2025 if ordered today
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