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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.
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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