Availability
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.
Showing In Stock Items. Show All 387 Items.
Radiator Cap, Spec-R, Stainless Steel, Natural, 32 psi, Universal, Each
Part Number: SNN-MRD501
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
BUILD IT WITH SUMMIT!
Estimated Ship Date: Today
Radiator Cap, Safecap, Billet Aluminum, Clear Anodized, Round, 16 psi, Each
Part Number: MEZ-WCC300
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, Safecap, Billet Aluminum, Clear Anodized, 25 psi, Each
Part Number: MEZ-WCC306
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, Round, Zinc, Natural, Autolite Logo, Concours Correct Cap, Ford, Each
Part Number: SDK-C7ZZ-8100-A
Estimated Ship Date: Today
Estimated Ship Date: Today
This product may not be eligible for select promotional offers
Radiator Cap, Spec-R, Stainless Steel, Natural, 42 psi, Universal, Each
Part Number: SNN-MRD500
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, 15 psi, Stant Logo, Steel, Natural, Each
Part Number: SNN-10294
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, Spec-R, Stainless Steel, Natural, 25 psi, Chrysler, Fiat, Dodge, Jeep, Each
Part Number: SNN-MRD502
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap/Gauge, Thermocap, Aluminum, Blue Anodized, Plain, 13 psi, 30-270 Degrees F, Each
Part Number: MRG-2470B
Estimated Ship Date: Today
Estimated Ship Date: Today
This product may not be eligible for select promotional offers
Radiator Cap, High-Pressure, Round, 22 to 24 psi, Billet Aluminum, Polished, Each
Part Number: CIR-50-10002
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, Steel, Natural, Round, Standard, Mini, 22/24 psi, Each
Part Number: GRI-KM65
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
COOLANT CAP BILLET SCALLOPED STYLE 16 PSI
Part Number: CTR-81-216
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, Round, Aluminum, Black Anodized, 14-18 psi, Each
Part Number: CSI-970CAP
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, 16 PSI, Aluminum, Black Anodized, Each
Part Number: PGP-PRP-7651
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, Aluminum, Polished, Octagon, Be Cool Logo, 13 psi, Each
Part Number: BCI-71002
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, Safecap, Billet Aluminum, Black Anodized, 7 psi, Each
Part Number: MEZ-WCC304
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Cap, Radiator, Griffin Logo Billet Polished Alum Cap - 17 lbs.,
Part Number: GRI-KM86
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, 21 psi., Round, Plastic, Black, Ford, Lincoln, Each
Part Number: MOF-RS531
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Caps, Recovery High-Pressure Radiator Caps, 19-21 psi Maximum Pressure, Round, Steel, Natural, Each
Part Number: AAF-ALL30125
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, Round, Finned Style, 16 psi, Polished, Each
Part Number: OTT-6201
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, 4 psi., Round, Chrome, Jeep, Each
Part Number: OMX-1710801
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, Spec-R, Stainless Steel, Natural, 22 psi, BMW, Mercedes, Each
Part Number: SNN-MRD503
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
HD Radiator Cap
Part Number: SNN-1006-15
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator Cap, Typ-A 1.3Bar - Black
Part Number: RDM-18-0076-A13
Not Yet Reviewed
Estimated Ship Date: Oct 23, 2025 if ordered today
Estimated Ship Date: Oct 23, 2025 if ordered today
Radiator Cap, Spec-R, Stainless Steel, Natural, 25 psi, Chrysler, Dodge, Fiat, Jeep, Each
Part Number: SNN-MRD507
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Radiator cap
Part Number: SNN-T20R
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Modal Header
Call To Order
This is a custom order part. You can order this part by Contacting Us.
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
Summit Racing™ Radiator Caps SUM-380173
