Caliso 665K6 Serpentine Belt Poly V K-Section - 66.5-Inch 6-Rib

The Caliso 665K6 is a 6-rib Poly V (K-section) serpentine belt measuring 66.5 inches in effective length with an outside circumference of approximately 67.25 inches. Designed as a direct OE-equivalent replacement, this belt is engineered to restore proper operation of engine-driven accessories such as the alternator, power steering pump, air conditioning compressor, and water pump.

Key Features:

• 6-Rib K-Section (Poly V) profile for precise pulley engagement and efficient power transfer
• 66.5-inch effective length — cross-references to industry standard part number 665K6
• Constructed with heat and ozone-resistant EPDM rubber for long service life
• Fiber-reinforced rib stock reduces noise from worn or misaligned pulleys
• Treated polyester tensile cord minimizes belt stretch and maintains proper tension over time
• Meets or exceeds RMA (Rubber Manufacturers Association) published rating standards
• Engineered for high-speed and high drive-ratio applications
• Drop-in OE fit, form, and function replacement — no modifications required

The 665K6 serpentine belt is a widely cross-referenced part number found across many vehicle applications. Also known as a Poly V belt or ribbed belt, it delivers reliable, quiet performance for the full service interval.