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Top off your radiator with a new radiator cap from Speedway Motors! No matter if you're looking for fashion or function, we've got you covered with beautiful chrome, stainless and brass caps, as well as, stock steel caps. We carry radiator caps from the cooler leaders like AFCO, C&R Radiators and Mr Gasket, so you can rest easy knowing you're getting the best cap possible. No matter what pressure rating you need, you can be we'll have it in stock and ready to ship today!

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Brassworks 4-PSI Radiator Cap for Brass Radiators

$29.99
$34.99
On Sale
Universal Fit
New Product

Material Type: Brass

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Speedway High Pressure Radiator Cap, 29-31 Lbs

Universal Fit

Overall Diameter: 2.47"

Material Type: Steel

Finish: Zinc Plated

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Speedway High Pressure Radiator Cap, 22-24 Lbs

Universal Fit

Overall Diameter: 2.47"

Pressure Rating: 22-24 lbs

Material Type: Steel

Finish: Zinc Plated

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Stant 10393 High Pressure Racing Radiator Cap, 28-32 Lbs

On Sale
Universal Fit

Overall Height: 2.625"

Overall Diameter: 2.50"

Pressure Rating: 28-32 lbs

Material Type: Steel

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High Pressure Radiator Cap, 20 Lbs

Universal Fit
Video Available

Overall Diameter: 2.47"

Pressure Rating: 20 lbs

Material Type: Steel

Finish: Zinc Plated

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AFCO High Pressure Radiator Cap: 29-31 lbs.

Universal Fit

Pressure Rating: 29-31 lbs

Material Type: Steel

Finish: Zinc Plated

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Stant 10372 High Pressure Racing Radiator Cap, 21-25 Lbs

On Sale
Universal Fit

Overall Height: 2.625"

Overall Length: 3.14"

Overall Diameter: 2.625"

Pressure Rating: 21-25 lbs

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C&R Radiators 1000010130 Radiator Cap, 30 Lbs

Overall Length: 2.55"

Pressure Rating: 30 lbs

Material Type: Steel

Finish: Nickel

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Speedway Safety Locking Radiator Cap, 28-32 Lbs.

Universal Fit

Overall Length: 3.07"

Overall Diameter: 32.59"

Pressure Rating: 28-32 lbs

Material Type: Steel

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Hex Chrome Radiator Cap, 15 Lbs

Universal Fit

Overall Diameter: 2.63"

Pressure Rating: 15 lbs

Material Type: Steel

Finish: Chrome

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1930-1931 Model A Flying Quail Radiator Cap

Overall Height: 3.50"

Overall Length: 4.75"

Overall Diameter: 3.00"

Material Type: Zinc

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Mr Gasket 2471S Thermocap Radiator Cap, 16 Lb.

Overall Diameter: 2.47"

Pressure Rating: 16 lbs

Material Type: Steel

Finish: Zinc Plated

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Round Chrome Radiator Pressure Cap, 15 Lbs

Universal Fit

Overall Diameter: 2.39"

Pressure Rating: 15 lbs

Material Type: Steel

Finish: Chrome

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1932 Ford Replacement Radiator Cap, Chrome Finish

Overall Height: 1.13"

Overall Diameter: 3.63"

Material Type: Zinc

Finish: Chrome

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AFCO 80152-16 Billet Aluminum Radiator Cap

Universal Fit

Overall Diameter: 2.86"

Mounted Height: .68"

Pressure Rating: 16 lbs

Material Type: Aluminum

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1928-1929 Model A Flying Quail Radiator Cap

Overall Height: 3.44"

Overall Length: 4.75"

Overall Diameter: 3.00"

Thread Pitch: 2-1/4"-18

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Speedway 16 Lb. Thermocap Radiator Cap

Universal Fit

Overall Diameter: 2.50"

Pressure Rating: 16 lbs

Material Type: Steel

Finish: Zinc Plated

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Stant 10392 High Pressure Racing Radiator Cap, 21-25 Lbs

Universal Fit

Overall Height: 2.625"

Overall Length: 2.625"

Pressure Rating: 21-25 lbs

Material Type: Steel

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Model T Hex Radiator Cap, Chrome, Undrilled

Universal Fit

Overall Height: 1.07"

Overall Diameter: 2.15"

Thread Pitch: 2"-18

Material Type: Steel

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OTB Gear 6202 Finned Radiator Cap, 7 Lbs

Universal Fit

Overall Diameter: 2.67"

Mounted Height: 1.00"

Pressure Rating: 7 psi

Material Type: Aluminum

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1928-1929 Ford Model A Radiator Cap

Overall Height: 1.06"

Overall Diameter: 2.67"

Thread Pitch: 2-1/4"-18

Material Type: Steel

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Model T Hex Radiator Cap, Chrome, Drilled

Universal Fit
Video Available

Overall Height: 1.07"

Overall Diameter: 2.14"

Hole Diameter: .44"

Thread Pitch: 2"-18

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Model T Dog Bone Radiator Cap, Chrome, Drilled

Video Available

Overall Height: 1.07"

Overall Length: 6.27"

Hole Diameter: .44"

Thread Pitch: 2"-18

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Model T Dog Bone Radiator Cap, Chrome, Undrilled

Overall Height: 1.08"

Overall Length: 6.27"

Thread Pitch: 2"-18

Material Type: Steel

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Chrome Radiator Pressure Cap, 7 lbs

Universal Fit

Overall Diameter: 2.40"

Material Type: Steel

Finish: Chrome

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1934 Ford Replacement Radiator Cap, Passenger Car, Chrome

Overall Height: 1.68"

Overall Length: 3.94"

Overall Diameter: 2.88"

Material Type: Zinc

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1930-1931 Ford Model A Radiator Pressure Cap

Overall Height: 1.20"

Overall Diameter: 3.07"

Material Type: Stainless Steel

Finish: Polished

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OTB Gear Finned Radiator Cap - 16 LB

Universal Fit

Overall Diameter: 2.63"

Mounted Height: 1.00"

Pressure Rating: 16 lbs

Material Type: Aluminum

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Hex Chrome Radiator Caps

Universal Fit

Overall Diameter: 2.63"

Material Type: Steel

Finish: Chrome

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Model T Gull Wing Cap, Chrome, Undrilled

Universal Fit

Overall Height: 2.94"

Overall Length: 5.75"

Thread Pitch: 2"-18

Material Type: Brass

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