Dayco PBU1375SS25 Engine Harmonic Balancer

Dayco Race Performance Underdrive Harmonic Balancer

The Dayco PBU1375SS25 is a race performance engine harmonic balancer built for select Chrysler, Dodge, and Jeep applications. It features a 25% underdrive design, neutral balance, and a steel outer ring with timing marks for accurate service and setup.

Key Features

• 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 reference during installation and service
• 3-bolt hole quantity and 1.475 crank bore
• Overall diameter: 6.890 in. / 175.00 mm
• Overall width: 3.701 in. / 94.00 mm

Detailed Description

Dayco PBU1375SS25 is engineered as a race performance harmonic balancer for vehicles that use a serpentine accessory drive. The 25% underdrive configuration reduces accessory speed relative to crankshaft speed, while the neutral balance design and steel outer ring support consistent operation in performance-focused builds. This part number is a direct fitment option for 2005-2010 Chrysler 300, 2008-2010 Dodge Challenger, 2006-2010 Dodge Charger, 2005-2010 Jeep Grand Cherokee, 2005-2008 Dodge Magnum, and 2006-2008 Jeep Commander.

The Dayco Race Performance 25% Underdrive line is aimed at applications where accessory drive speed control and accurate crankshaft indexing matter. The PBU1375SS25 includes timing marks and a single 6-groove serpentine pulley, making it a practical choice for service, replacement, or performance-oriented engine assembly work on Chrysler 300, Dodge Charger, and related platforms.

What This Part Helps Address

• Worn or damaged engine harmonic balancer
• Crankshaft vibration control concerns
• Accessory drive speed mismatch in performance setups
• Timing reference visibility during engine service
• Serpentine pulley wear on the front of the engine

Installation Notes and Tips

Verify crank bore, nose outside diameter, bolt hole quantity, and pulley alignment before installation. This balancer does not include hardware, installation instructions, or a Woodruff key, so reuse or source the correct engine-specific components as required. Confirm timing mark orientation and ensure the crankshaft and pulley surfaces are clean before final assembly. Fits 2005-2010 Chrysler 300, N/A; Fits 2008-2010 Dodge Challenger, N/A; Fits 2006-2010 Dodge Charger, N/A; Fits 2005-2010 Jeep Grand Cherokee, N/A; Fits 2005-2008 Dodge Magnum, N/A; Fits 2006-2008 Jeep Commander, N/A.

Quality Assurance

Dayco manufactures performance-focused engine components for demanding automotive applications. Part number PBU1375SS25 is built with a steel outer ring, neutral balance, and timing marks to support accurate fitment and service on the listed Chrysler, Dodge, and Jeep vehicles.