Caliso 338K4 Poly V Serpentine Belt K-Series - 33.8 4-Rib

The Caliso 338K4 is a K-Series Poly V (Multi-Rib) serpentine belt featuring a 33.8-inch pitch length and 4 ribs, designed for reliable performance in automotive accessory drive systems. Also commonly referenced as a 4PK855 belt, this micro-rib design provides consistent power transfer across the belt's full contact surface.

Key Features:

• K-Series Poly V / Multi-Rib design for smooth, efficient power transfer
• 4 ribs with precision-formed profile for maximum pulley contact
• 33.8" pitch length (approximately 0.56" rib width) for accurate fitment
• 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 resists stretch and fatigue under load
• Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications

The 338K4 is also cross-referenced as part number 4PK855 and is an OEM-equivalent replacement belt suitable for a wide range of automotive applications. Its durable construction ensures dependable performance in demanding engine bay conditions.