Driveworks 420K4 Serpentine Belt - 4-Rib 42 Inch

The Driveworks 420K4 is a 4-rib serpentine belt engineered for reliable performance in automotive drive systems. This poly-V belt features a 42-inch pitch length and is designed to provide superior belt-to-pulley contact for efficient power transmission in passenger cars and light-duty trucks.

Key Features:

• 4-rib K-series serpentine belt with 42-inch pitch length (42.75-inch outside measurement)
• Constructed with heat and ozone resistant EPDM rubber for long-lasting durability
• Specialized high-temperature polymer compound maximizes load carrying requirements and belt life
• Fiber-reinforced rib stock enhances belt stability and reduces noise from worn or misaligned pulleys
• Treated polyester cord construction minimizes belt stretch over time

This serpentine belt is designed to meet the stringent demands of modern automotive drive systems, delivering dependable performance for power steering, alternator, and accessory drive applications. The Driveworks 420K4 replaces OEM part numbers including Dayco 5040420, Gates K040420, NAPA 25-040420, Goodyear 4040420, Bando 4PK1066, and ACDelco 4K420.