Caliso 550K4 Poly V Serpentine Belt OC - 4-Rib 55.75in

The Caliso 550K4 is a K-series Poly V (Micro Rib) serpentine belt designed as a direct OEM-replacement accessory drive belt. With a 4-rib profile and 55.75-inch outside circumference, this belt delivers reliable power transfer to engine accessories including the alternator, power steering pump, and air conditioning compressor.

Key Specifications:

• Belt Type: K-Series Poly V / Micro Rib Serpentine Belt
• Outside Circumference: 55.75 in (1,416 mm)
• Top Width: 0.56 in (14.2 mm)
• Belt Depth: 0.17 in (4.3 mm)
• Number of Ribs: 4
• Belt Section: K / 4PK
• Metric Equivalent: 4PK1400

Key Features:

• Constructed from heat and ozone-resistant EPDM rubber for extended service life
• Fiber-reinforced rib stock improves belt stability and reduces noise from worn or misaligned pulleys
• Engineered to meet or exceed RMA, SAE J1459, SAE J2432, and SAE J1596 quality standards
• Designed to restore proper accessory drive belt system performance
• Cross-references to OEM and aftermarket part numbers including 4PK1400, 4K551, 4040550, and 5040550

The 550K4 serpentine belt is a trusted industry-standard part number offered by multiple manufacturers, making it a widely compatible and readily available replacement for worn or damaged accessory drive belts.