Dayco PBU1639SS25 Engine Harmonic Balancer

Dayco Race Performance Underdrive Balancer

The Dayco Race Performance 25% Underdrive engine harmonic balancer is built for drivers who want a direct-fit performance component for select Jeep, Dodge, and Chrysler applications. Part number PBU1639SS25 combines a neutral balance design with timing marks and a steel outer ring for a precise, race-focused setup.

Compatible with 2011-2023 Dodge Challenger, 2012-2023 Dodge Charger, 2018-2024 Dodge Durango, 2012-2021 Jeep Grand Cherokee, 2021-2026 Jeep Wrangler, and select Chrysler 300 applications, this balancer is part of Dayco’s Race Performance 25% Underdrive line. That product line is aimed at reducing accessory drive speed to support performance-oriented engine builds while maintaining a fitment-specific design.

Key Features

• Part number PBU1639SS25
• Race Performance 25% Underdrive design
• Neutral balance with no counterweight
• Steel outer ring construction
• Single integrated serpentine pulley with 6 grooves
• Timing marks included for setup reference
• 3-bolt hole configuration
• No crank trigger/exciter plate
• No woodruff key included

Detailed Product Overview

This Dayco engine harmonic balancer is engineered with a 1.475-inch crank bore, 1.977-inch nose outside diameter, 5.788-inch overall outside diameter, and 3.701-inch overall width. The ring width measures 1.700 inches, and the integrated pulley measures 4.689 inches outside diameter. These dimensions matter for buyers searching for a Dodge Charger harmonic balancer, Jeep Grand Cherokee harmonic balancer, or Chrysler 300 performance balancer that matches the listed engine interface.

PBU1639SS25 is a practical choice for performance builds where accessory drive reduction and accurate timing reference are priorities. It is listed for 2011-2023 Dodge Challenger, 2012-2023 Dodge Charger, 2018-2024 Dodge Durango, 2012-2021 Jeep Grand Cherokee, 2021-2026 Jeep Wrangler, and Chrysler 300 applications in the years shown below.

What This Part Helps Address

• Worn or damaged harmonic balancer replacement
• Timing mark visibility during engine setup
• Accessory drive speed reduction for race-oriented builds
• Vibration control concerns related to a failing balancer
• Fitment needs for select Dodge, Jeep, and Chrysler performance applications

Installation Notes and Tips

Verify crank bore, nose diameter, bolt-hole pattern, and pulley alignment before installation. Because hardware, installation instructions, and a woodruff key are not included, confirm that all required engine-specific components are on hand before beginning the job. Use the timing marks as a reference during engine assembly and final verification.

• Fits 2021-2026 Jeep Wrangler, N/A, Race Performance 25% Underdrive
• Fits 2018-2024 Dodge Durango, N/A, Race Performance 25% Underdrive
• Fits 2023 Chrysler 300, N/A, Race Performance 25% Underdrive
• Fits 2012-2014 Chrysler 300, N/A, Race Performance 25% Underdrive
• Fits 2011-2023 Dodge Challenger, N/A, Race Performance 25% Underdrive
• Fits 2012-2023 Dodge Charger, N/A, Race Performance 25% Underdrive
• Fits 2012-2021 Jeep Grand Cherokee, N/A, Race Performance 25% Underdrive

Quality Assurance

Dayco is a recognized name in engine drive components, and this Race Performance balancer is built to match the listed specifications for the confirmed vehicle applications. Part number PBU1639SS25 should be matched carefully to the engine and fitment details shown for your Dodge Challenger, Dodge Charger, Jeep Grand Cherokee, Jeep Wrangler, Chrysler 300, or Dodge Durango application.