Dayco 5050385 Poly-Cog Serpentine Belt - 5-Rib

The Dayco 5050385 Poly-Cog serpentine belt features advanced transverse groove design that delivers superior performance and extended service life for automotive and light truck applications. This premium 5-rib belt (also known by industry number 5PK9780) combines innovative engineering with durable construction to meet the demands of modern engine accessory drive systems.

Key Features:

• Transverse cog design runs up to 50°F cooler than conventional belts while dramatically reducing rib cracking
• Grooved construction provides flexural stress relief for enhanced flexibility in both normal and backside bending applications
• Superior rubber backing maximizes load-carrying capability while minimizing operational noise
• Specially treated polyester cord construction resists stretching and ensures length and tension stability throughout the belt's service life
• Computer-designed cog placement eliminates harmonic squeal for quieter operation
• Meets or exceeds SAE J1459 and J1596 specifications for quality assurance
• EPDM (Ethylene-Propylene-Diene-Monomer) compound construction resists heat and harsh under-hood environments

This Poly-Cog belt delivers torque-carrying capacity equal to or better than conventional multi-rib belts, making it an excellent choice for stock and performance applications. The advanced design increases belt life by at least 40% compared to standard serpentine belts.