Caliso 373K4 Poly-V Serpentine Belt K-Section - 4-Rib 37.3

The Caliso 373K4 is a K-section Poly-V (multi-ribbed) serpentine belt featuring 4 ribs and an effective length of 37.3 inches. Also known as an FVP Poly V Belt, this micro-rib belt is engineered to deliver reliable power transmission across automotive and small equipment accessory drive systems.

Key Features:

• K-Section Poly-V design with 4 ribs for efficient, smooth power transfer
• EPDM rubber construction — heat and ozone resistant for extended service life
• Treated polyester cord reinforcement to minimize belt stretch under load
• Fiber-reinforced rib stock reduces noise caused by worn or misaligned pulleys
• High-temperature polymer compound rated for maximum operating temperatures up to 265°F
• 37.3" effective length with a 0.56" top width and 3.56 mm rib pitch
• Meets or exceeds OEM specifications for direct replacement applications

Cross-referenced under part number 373K4 across multiple brands including FVP, Duralast, Driveworks, and Auto Extra. Suitable for high-speed, high-drive-ratio accessory belt applications.