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Dayco PBU1480SS25 Engine Harmonic Balancer
| Brand | Dayco PBU1480SS25 |
|---|---|
| Bolt Hole Quantity | 6 |
| Counterweight Balance | Neutral, no counterweight |
| Crank Bore | 1.481 |
| Crank Bore | 37.60 |
| Crank Trigger/Exciter Plate | No |
| Hardware Included | No |
| Installation Instructions Included | Yes |
| Nose Outside Diameter | 2.128 |
| Nose Outside Diameter | 54.05 |
| Number of Integrated Pulleys | 2 |
| Outer Ring Material | Steel |
| Overall Outside Diameter | 158.00 |
| Overall Outside Diameter | 6.221 |
| Overall Width | 3.859 |
| Overall Width | 98.00 |
| Pulley 1 Number Of Grooves | 4 |
| Pulley 1 Outside Diameter | 141.000 |
| Pulley 1 Outside Diameter | 5.552 |
| Pulley 1 Type | Serpentine |
| Pulley 2 Number Of Grooves | 6 |
| Pulley 2 Outside Diameter | 141.000 |
| Pulley 2 Outside Diameter | 5.552 |
| Pulley 2 Type | Serpentine |
| Ring Width | 2.500 |
| Ring Width | 63.50 |
| Timing Marks | Yes |
| Woodruff Key Included | No |
| Product line | Race Performance 25% Underdrive |
| Fits | Chevrolet and Pontiac · 13 vehicles |
Race Performance line. Built for spirited engine performance with a 25% underdrive design.
Neutral balance. No counterweight for a clean, balanced harmonic balancer setup.
Dual serpentine pulleys. Integrated 4- and 6-groove pulley design for accessory drive support.
Cross-references Pioneer 872055 for the same application. See all 1.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Dayco Race Performance Underdrive Balancer
The Dayco Race Performance 25% Underdrive harmonic balancer, part number PBU1480SS25, is built for performance applications that need precise crankshaft damping with reduced accessory drive speed. It is a neutral-balance engine harmonic balancer with timing marks, a steel outer ring, and dual integrated serpentine pulleys for 4-groove and 6-groove belt layouts.
Compatible with 2004-2006 Pontiac GTO, 1998-2002 Chevrolet Camaro, and 1998-2002 Pontiac Firebird, this Dayco PBU1480SS25 balancer supports race-focused accessory drive changes while maintaining the fitment details required for the listed applications.
Key Features
- Part number PBU1480SS25 from Dayco Race Performance 25% Underdrive
- Neutral balance design with no counterweight
- Steel outer ring for durability
- Two integrated serpentine pulleys
- Pulley 1: 4 grooves, 5.552 in. outside diameter
- Pulley 2: 6 grooves, 5.552 in. outside diameter
- Timing marks included for setup and service
- Crank bore: 1.481 in. (37.60 mm)
- Nose outside diameter: 2.128 in. (54.05 mm)
- Overall outside diameter: 6.221 in. (158.00 mm)
- Overall width: 3.859 in. (98.00 mm)
Product Details
Dayco’s Race Performance 25% Underdrive line is aimed at performance builds that need a reduced accessory drive ratio without changing the basic harmonic balancer format. The PBU1480SS25 uses a steel outer ring, neutral counterweight balance, and a dual-pulley arrangement to match the listed belt configurations. This part number PBU1480SS25 is a direct fitment option for 2004-2006 Pontiac GTO, 1998-2002 Chevrolet Camaro, and 1998-2002 Pontiac Firebird applications listed in the catalog.
This part cross-references Pioneer 872055 for the same application.
What It Helps Address
- Crankshaft vibration control in performance engine builds
- Accessory drive speed reduction from an underdrive pulley setup
- Belt routing needs for 4-groove and 6-groove serpentine systems
- Timing reference visibility during engine service
- Replacement needs for a worn or damaged harmonic balancer
Installation Notes
Installation instructions are included. Verify crank bore, nose diameter, pulley groove count, and overall dimensions before installation. Hardware is not included, and a woodruff key is not included. Confirm the engine’s balance requirements and timing mark orientation before final assembly. For 2004-2006 Pontiac GTO, 1998-2002 Chevrolet Camaro, and 1998-2002 Pontiac Firebird applications, match the belt system and pulley layout to the vehicle’s existing configuration.
Quality Assurance
Dayco manufactures this Race Performance harmonic balancer with a steel outer ring and neutral balance construction for the specified applications. The included installation instructions support proper setup and fitment verification for the listed vehicles.
Fitment
- Fits 2004-2006 Pontiac GTO, N/A — Race Performance 25% Underdrive
- Fits 1998-2002 Chevrolet Camaro, N/A — Race Performance 25% Underdrive
- Fits 1998-2002 Pontiac Firebird, N/A — Race Performance 25% Underdrive
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 2006 | Pontiac | GTO | — | — | Race Performance 25% Underdrive |
| 2005 | Pontiac | GTO | — | — | Race Performance 25% Underdrive |
| 2004 | Pontiac | GTO | — | — | Race Performance 25% Underdrive |
| 2002 | Chevrolet | Camaro | 5.7L | V8 | Race Performance 25% Underdrive |
| 2002 | Pontiac | Firebird | 5.7L | V8 | Race Performance 25% Underdrive |
| 2001 | Chevrolet | Camaro | 5.7L | V8 | Race Performance 25% Underdrive |
| 2001 | Pontiac | Firebird | 5.7L | V8 | Race Performance 25% Underdrive |
| 2000 | Chevrolet | Camaro | 5.7L | V8 | Race Performance 25% Underdrive |
| 2000 | Pontiac | Firebird | 5.7L | V8 | Race Performance 25% Underdrive |
| 1999 | Chevrolet | Camaro | 5.7L | V8 | Race Performance 25% Underdrive |
| 1999 | Pontiac | Firebird | 5.7L | V8 | Race Performance 25% Underdrive |
| 1998 | Chevrolet | Camaro | 5.7L | V8 | Race Performance 25% Underdrive |
| 1998 | Pontiac | Firebird | 5.7L | V8 | Race Performance 25% Underdrive |
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