Caliso 638K6 Poly-V Serpentine Belt K-Section - 6-Rib 63.8in

The Caliso 638K6 is a K-section Poly-V (serpentine) belt featuring 6 ribs and a 63.8-inch pitch length with an outside circumference of approximately 64.55 inches. Designed to meet or exceed OEM specifications, this micro-rib belt delivers reliable power transfer across a wide range of accessory drive applications.

Key Features:

• Belt Type: K-Section Poly-V (Micro-Rib / Serpentine)
• Number of Ribs: 6
• Pitch Length: 63.8 inches
• Outside Circumference: 64.55 inches (1,639.57 mm)
• Cross-Reference: 6PK1620
• Constructed from abrasion-resistant and heat-resistant compounds for long service life
• Engineered for high-speed and high drive-ratio applications
• Meets or exceeds RMA published ratings for serpentine belts

The 638K6 Poly-V belt is a direct drop-in replacement for OEM and aftermarket serpentine belts sharing the 638K6 / 6PK1620 specification. Its multi-rib design provides superior flexibility, reduced slippage, and quieter operation compared to traditional V-belts, making it a dependable choice for power-driven accessories.