Caliso 663K6 Poly V Serpentine Belt 6-Rib K-Section 66.33" Effective Length

The Caliso 663K6 is a 6-rib, K-section Poly V serpentine belt (also known as a multi-rib or micro-V belt) engineered as a direct OEM-quality replacement for a wide range of domestic passenger car and light truck applications. With an effective length of 66.33 inches (1685 mm) and an outside circumference of 66.9 inches (1699 mm), this belt is precision-dimensioned to maintain proper tension and accessory drive alignment.

Key Features:

• 6-Rib K-Section Design: Delivers efficient power transmission with a 3.56mm rib pitch for optimal grip and flexibility across the full pulley path
• Top Width: 0.807 inches (20 mm) for correct pulley engagement
• EPDM Construction: Synthetic rubber compound offers excellent resistance to heat, ozone, and abrasion for extended service life
• Polyester Tensile Cords: Embedded reinforcement cords minimize belt stretch and reduce the risk of slippage or failure under load
• OEM-Comparable Fit: Meets dimensional and performance specifications for standard accessory drive applications
• Quiet Operation: Rib profile reduces noise and vibration compared to worn or mismatched belts

This serpentine belt drives critical engine accessories including the alternator, power steering pump, air conditioning compressor, and water pump from a single continuous loop. Cross-references include part numbers K060663, 4060663, 6K663, 6PK1685, 6PK1684, 665K6, 663K6MK, A-663K6, and many others. Always verify routing against the vehicle's underhood belt diagram, and inspect pulleys and tensioners for wear prior to installation.