Moroso Racing Radiator Cap - 19-21lbs

Marsoni

M251S

$23.99

Get it in 3 business days with 1 day shipping. Friday, May 29

Moroso Racing Radiator Cap - 19-21lbsSKU: 63320 UPC: 084663633201 Moroso Racing Radiator Cap 19 21 PSI (Universal Fit) The Moroso Racing Radiator Cap 63320 delivers 19 21 PSI pressure to keep coolant from boiling over during high heat racing conditions. This cap fits standard 1 5 16 inch radiator necks on most passenger cars light trucks and performance vehicles. It raises the coolant boiling point by 25 30 degrees F for reliable engine cooling under extreme loads. Key Features 19 21 PSI

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I have them in every color and used to get them from Sams, but they stopped selling them and I was lucky to find them on Amazon. Got all colors again. They stay, it's all I'm gonna say! And don't show in any of my tennis shoes. Absolutely love them and wear them until they get holes. They last a LONG time too. They're on the thin side and my foot loves them because they tend to get hot. There's no shrinking, they wash great with exception of the white ones I couldn't manage to keep white - they turned a bit greyish.

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Reviewed in the United States on January 4, 2026

Verified Purchase

Christy F

New York, US

★★★★★ 5

Great socks

Size: Medium, Color: Pink - 647

Well-made and comfortable to wear. Great for golf and other outdoor activities. Like them because they do not show above shoes.

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Reviewed in the United States on April 19, 2026