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Street Performance Balancer

Dayco PB1056ST Engine Harmonic Balancer

Brand	Dayco PB1056ST
Counterweight Balance	Neutral, no counterweight
Crank Bore	1.375
Crank Bore	34.90
Crank Trigger/Exciter Plate	No
Hardware Included	No
Installation Instructions Included	No
Nose Outside Diameter	1.869
Nose Outside Diameter	47.46
Number of Integrated Pulleys	0
Outer Ring Material	Cast Iron
Overall Outside Diameter	6.752
Overall Outside Diameter	171.50
Overall Width	3.249
Overall Width	82.50
Ring Width	1.171
Ring Width	29.74
Timing Marks	Yes
Woodruff Key Included	No
Product line	Street Performance Balancer
Fits	Pontiac, Buick, and Oldsmobile · 186 vehicles

Street performance balancer. Built for engine balancing with a neutral, no-counterweight design.

Cast iron ring. Durable outer ring construction for dependable harmonic control.

Timing marks included. Makes setup and alignment easier during installation.

Cross-references Dorman 594-158S, Pioneer 872011 and Pioneer DA-4551HD for the same application. See all 3.

$185.78Free shipping

In stock · usually ships same day before 1pm CST

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Free returns within 60 days if it doesn't fit when fitment is verified.

Not what you need? See all Engine Harmonic Balancer options

Dayco Street Performance Balancer for Pontiac V8 Applications

The Dayco PB1056ST Street Performance Balancer is an engine harmonic balancer built for Pontiac performance and restoration applications. It features a neutral balance design, cast iron outer ring, and timing marks for accurate engine setup on compatible Pontiac, Buick, and Oldsmobile V8 vehicles.

Key Features

Part number PB1056ST from Dayco Street Performance Balancer line
Neutral balance design with no counterweight
Cast iron outer ring for durable engine service
Timing marks included for ignition and engine reference
4-bolt hole quantity
Crank bore: 1.375 in. / 34.90 mm
Nose outside diameter: 1.869 in. / 47.46 mm
Overall outside diameter: 6.752 in. / 171.50 mm
Overall width: 3.249 in. / 82.50 mm
Ring width: 1.171 in. / 29.74 mm
No integrated pulleys, crank trigger plate, or woodruff key included

Street Performance Balancer Details

Dayco’s Street Performance Balancer line is aimed at engines that need a straightforward harmonic balancer with OE-style fitment details and performance-oriented construction. The PB1056ST uses a cast iron outer ring and neutral balance configuration, making it a direct choice for engines that require a non-counterweighted balancer with timing marks and standard crankshaft dimensions. This part cross-references Dorman 594-158S and Pioneer 872011 for the same application. The PB1056ST is a practical option for Pontiac GTO, Firebird, Grand Prix, LeMans, Grand Am, Bonneville, Catalina, Laurentian, and Parisienne applications, along with select Buick and Oldsmobile models listed below.

Vehicle Fitment

Fits 1968-1979 Pontiac Firebird, N/A
Fits 1968-1978 Pontiac Bonneville, N/A
Fits 1968-1978 Pontiac Catalina, N/A
Fits 1975-1977 Pontiac Grand LeMans, N/A
Fits 1968-1977 Pontiac Grand Prix, N/A
Fits 1976-1977 Pontiac Laurentian, N/A
Fits 1971-1974 Pontiac Laurentian, N/A
Fits 1968-1977 Pontiac LeMans, N/A
Fits 1976-1977 Pontiac Parisienne, N/A
Fits 1971-1974 Pontiac Parisienne, N/A
Fits 1975 Buick LeSabre, N/A
Fits 1975 Oldsmobile 98, N/A
Fits 1975 Oldsmobile Custom Cruiser, N/A
Fits 1975 Oldsmobile Delta 88, N/A
Fits 1973-1975 Pontiac Grand Am, N/A
Fits 1968-1973 Pontiac GTO, N/A
Fits 1969 Pontiac Catalina, N/A, w/o Ram Air

Installation Notes

Verify crank bore, nose diameter, overall diameter, and balance requirements before installation. Timing marks are provided for engine reference, and the balancer does not include hardware, installation instructions, a crank trigger plate, or a woodruff key. Confirm pulley and accessory alignment since this unit has no integrated pulleys.

Quality Assurance

Inspect the balancer for correct balance type, bore size, and timing mark alignment before assembly. Dayco’s Street Performance Balancer line is built for engine applications that require consistent dimensional accuracy and a cast iron outer ring construction.

This part fits 186 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Position	Notes
1979	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1978	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1978	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1978	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1977	Pontiac	Bonneville	5.7L	V8	N/A	Street Performance Balancer
1977	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1977	Pontiac	Catalina	5.7L	V8	N/A	Street Performance Balancer
1977	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1977	Pontiac	Firebird	5.7L	V8	N/A	Street Performance Balancer
1977	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1977	Pontiac	Grand LeMans	5.7L	V8	N/A	Street Performance Balancer
1977	Pontiac	Grand LeMans	6.6L	V8	N/A	Street Performance Balancer
1977	Pontiac	Grand Prix	5.7L	V8	N/A	Street Performance Balancer
1977	Pontiac	Grand Prix	6.6L	V8	N/A	Street Performance Balancer
1977	Pontiac	Laurentian	5.7L	V8	N/A	Street Performance Balancer
1977	Pontiac	LeMans	5.7L	V8	N/A	Street Performance Balancer
1977	Pontiac	LeMans	6.6L	V8	N/A	Street Performance Balancer
1977	Pontiac	Parisienne	5.7L	V8	N/A	Street Performance Balancer
1976	Pontiac	Bonneville	7.5L	V8	N/A	Street Performance Balancer
1976	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1976	Pontiac	Catalina	5.7L	V8	N/A	Street Performance Balancer
1976	Pontiac	Catalina	7.5L	V8	N/A	Street Performance Balancer
1976	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1976	Pontiac	Firebird	5.7L	V8	N/A	Street Performance Balancer
1976	Pontiac	Firebird	7.5L	V8	N/A	Street Performance Balancer
1976	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1976	Pontiac	Grand LeMans	5.7L	V8	N/A	Street Performance Balancer
1976	Pontiac	Grand LeMans	7.5L	V8	N/A	Street Performance Balancer
1976	Pontiac	Grand LeMans	6.6L	V8	N/A	Street Performance Balancer
1976	Pontiac	Grand Prix	5.7L	V8	N/A	Street Performance Balancer
1976	Pontiac	Grand Prix	7.5L	V8	N/A	Street Performance Balancer
1976	Pontiac	Grand Prix	6.6L	V8	N/A	Street Performance Balancer
1976	Pontiac	Laurentian	6.6L	V8	N/A	Street Performance Balancer
1976	Pontiac	Laurentian	7.5L	V8	N/A	Street Performance Balancer
1976	Pontiac	Laurentian	5.7L	V8	N/A	Street Performance Balancer
1976	Pontiac	LeMans	5.7L	V8	N/A	Street Performance Balancer
1976	Pontiac	LeMans	7.5L	V8	N/A	Street Performance Balancer
1976	Pontiac	LeMans	6.6L	V8	N/A	Street Performance Balancer
1976	Pontiac	Parisienne	6.6L	V8	N/A	Street Performance Balancer
1976	Pontiac	Parisienne	7.5L	V8	N/A	Street Performance Balancer
1976	Pontiac	Parisienne	5.7L	V8	N/A	Street Performance Balancer
1975	Buick	LeSabre	6.6L	V8	N/A	Street Performance Balancer
1975	Oldsmobile	98	6.6L	V8	N/A	Street Performance Balancer
1975	Oldsmobile	Custom Cruiser	6.6L	V8	N/A	Street Performance Balancer
1975	Oldsmobile	Delta 88	6.6L	V8	N/A	Street Performance Balancer
1975	Pontiac	Bonneville	7.5L	V8	N/A	Street Performance Balancer
1975	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1975	Pontiac	Catalina	7.5L	V8	N/A	Street Performance Balancer
1975	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1975	Pontiac	Firebird	5.7L	V8	N/A	Street Performance Balancer
1975	Pontiac	Firebird	7.5L	V8	N/A	Street Performance Balancer
1975	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1975	Pontiac	Grand Am	5.7L	V8	N/A	Street Performance Balancer
1975	Pontiac	Grand Am	7.5L	V8	N/A	Street Performance Balancer
1975	Pontiac	Grand Am	6.6L	V8	N/A	Street Performance Balancer
1975	Pontiac	Grand LeMans	5.7L	V8	N/A	Street Performance Balancer
1975	Pontiac	Grand LeMans	7.5L	V8	N/A	Street Performance Balancer
1975	Pontiac	Grand LeMans	6.6L	V8	N/A	Street Performance Balancer
1975	Pontiac	Grand Prix	7.5L	V8	N/A	Street Performance Balancer
1975	Pontiac	Grand Prix	6.6L	V8	N/A	Street Performance Balancer
1975	Pontiac	LeMans	5.7L	V8	N/A	Street Performance Balancer
1975	Pontiac	LeMans	6.6L	V8	N/A	Street Performance Balancer
1974	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1974	Pontiac	Bonneville	7.5L	V8	N/A	Street Performance Balancer
1974	Pontiac	Bonneville	5.7L	V8	N/A	Street Performance Balancer
1974	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1974	Pontiac	Catalina	7.5L	V8	N/A	Street Performance Balancer
1974	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1974	Pontiac	Firebird	7.5L	V8	N/A	Street Performance Balancer
1974	Pontiac	Firebird	5.7L	V8	N/A	Street Performance Balancer
1974	Pontiac	Grand Am	6.6L	V8	N/A	Street Performance Balancer
1974	Pontiac	Grand Am	7.5L	V8	N/A	Street Performance Balancer
1974	Pontiac	Grand Am	5.7L	V8	N/A	Street Performance Balancer
1974	Pontiac	Grand Prix	6.6L	V8	N/A	Street Performance Balancer
1974	Pontiac	Grand Prix	7.5L	V8	N/A	Street Performance Balancer
1974	Pontiac	Laurentian	5.7L	V8	N/A	Street Performance Balancer
1974	Pontiac	Laurentian	6.6L	V8	N/A	Street Performance Balancer
1974	Pontiac	Laurentian	7.5L	V8	N/A	Street Performance Balancer
1974	Pontiac	LeMans	5.7L	V8	N/A	Street Performance Balancer
1974	Pontiac	LeMans	6.6L	V8	N/A	Street Performance Balancer
1974	Pontiac	LeMans	7.5L	V8	N/A	Street Performance Balancer
1974	Pontiac	Parisienne	5.7L	V8	N/A	Street Performance Balancer
1974	Pontiac	Parisienne	6.6L	V8	N/A	Street Performance Balancer
1974	Pontiac	Parisienne	7.5L	V8	N/A	Street Performance Balancer
1973	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1973	Pontiac	Bonneville	7.5L	V8	N/A	Street Performance Balancer
1973	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1973	Pontiac	Catalina	7.5L	V8	N/A	Street Performance Balancer
1973	Pontiac	Catalina	5.7L	V8	N/A	Street Performance Balancer
1973	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1973	Pontiac	Firebird	7.5L	V8	N/A	Street Performance Balancer
1973	Pontiac	Firebird	5.7L	V8	N/A	Street Performance Balancer
1973	Pontiac	Grand Am	6.6L	V8	N/A	Street Performance Balancer
1973	Pontiac	Grand Am	7.5L	V8	N/A	Street Performance Balancer
1973	Pontiac	Grand Am	5.7L	V8	N/A	Street Performance Balancer
1973	Pontiac	Grand Prix	6.6L	V8	N/A	Street Performance Balancer
1973	Pontiac	Grand Prix	7.5L	V8	N/A	Street Performance Balancer
1973	Pontiac	GTO	7.5L	V8	N/A	Street Performance Balancer
1973	Pontiac	GTO	6.6L	V8	N/A	Street Performance Balancer
1973	Pontiac	Laurentian	5.7L	V8	N/A	Street Performance Balancer
1973	Pontiac	Laurentian	6.6L	V8	N/A	Street Performance Balancer
1973	Pontiac	Laurentian	7.5L	V8	N/A	Street Performance Balancer
1973	Pontiac	LeMans	6.6L	V8	N/A	Street Performance Balancer
1973	Pontiac	LeMans	7.5L	V8	N/A	Street Performance Balancer
1973	Pontiac	LeMans	5.7L	V8	N/A	Street Performance Balancer
1973	Pontiac	Parisienne	5.7L	V8	N/A	Street Performance Balancer
1973	Pontiac	Parisienne	6.6L	V8	N/A	Street Performance Balancer
1973	Pontiac	Parisienne	7.5L	V8	N/A	Street Performance Balancer
1972	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1972	Pontiac	Bonneville	7.5L	V8	N/A	Street Performance Balancer
1972	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1972	Pontiac	Catalina	7.5L	V8	N/A	Street Performance Balancer
1972	Pontiac	Catalina	5.7L	V8	N/A	Street Performance Balancer
1972	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1972	Pontiac	Firebird	7.5L	V8	N/A	Street Performance Balancer
1972	Pontiac	Firebird	5.7L	V8	N/A	Street Performance Balancer
1972	Pontiac	Grand Prix	6.6L	V8	N/A	Street Performance Balancer
1972	Pontiac	Grand Prix	7.5L	V8	N/A	Street Performance Balancer
1972	Pontiac	GTO	6.6L	V8	N/A	Street Performance Balancer
1972	Pontiac	GTO	7.5L	V8	N/A	Street Performance Balancer
1972	Pontiac	Laurentian	5.7L	V8	N/A	Street Performance Balancer
1972	Pontiac	Laurentian	6.6L	V8	N/A	Street Performance Balancer
1972	Pontiac	Laurentian	7.5L	V8	N/A	Street Performance Balancer
1972	Pontiac	LeMans	6.6L	V8	N/A	Street Performance Balancer
1972	Pontiac	LeMans	7.5L	V8	N/A	Street Performance Balancer
1972	Pontiac	LeMans	5.7L	V8	N/A	Street Performance Balancer
1972	Pontiac	Parisienne	5.7L	V8	N/A	Street Performance Balancer
1972	Pontiac	Parisienne	6.6L	V8	N/A	Street Performance Balancer
1972	Pontiac	Parisienne	7.5L	V8	N/A	Street Performance Balancer
1971	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1971	Pontiac	Bonneville	7.5L	V8	N/A	Street Performance Balancer
1971	Pontiac	Bonneville	5.7L	V8	N/A	Street Performance Balancer
1971	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1971	Pontiac	Catalina	7.5L	V8	N/A	Street Performance Balancer
1971	Pontiac	Catalina	5.7L	V8	N/A	Street Performance Balancer
1971	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1971	Pontiac	Firebird	7.5L	V8	N/A	Street Performance Balancer
1971	Pontiac	Firebird	5.7L	V8	N/A	Street Performance Balancer
1971	Pontiac	Grand Prix	6.6L	V8	N/A	Street Performance Balancer
1971	Pontiac	Grand Prix	7.5L	V8	N/A	Street Performance Balancer
1971	Pontiac	GTO	6.6L	V8	N/A	Street Performance Balancer
1971	Pontiac	GTO	7.5L	V8	N/A	Street Performance Balancer
1971	Pontiac	Laurentian	5.7L	V8	N/A	Street Performance Balancer
1971	Pontiac	Laurentian	6.6L	V8	N/A	Street Performance Balancer
1971	Pontiac	Laurentian	7.5L	V8	N/A	Street Performance Balancer
1971	Pontiac	LeMans	6.6L	V8	N/A	Street Performance Balancer
1971	Pontiac	LeMans	5.7L	V8	N/A	Street Performance Balancer
1971	Pontiac	Parisienne	5.7L	V8	N/A	Street Performance Balancer
1971	Pontiac	Parisienne	6.6L	V8	N/A	Street Performance Balancer
1971	Pontiac	Parisienne	7.5L	V8	N/A	Street Performance Balancer
1970	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1970	Pontiac	Bonneville	7.5L	V8	N/A	Street Performance Balancer
1970	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1970	Pontiac	Catalina	7.5L	V8	N/A	Street Performance Balancer
1970	Pontiac	Catalina	5.7L	V8	N/A	Street Performance Balancer
1970	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1970	Pontiac	Firebird	5.7L	V8	N/A	Street Performance Balancer
1970	Pontiac	Grand Prix	6.6L	V8	N/A	Street Performance Balancer
1970	Pontiac	Grand Prix	7.5L	V8	N/A	Street Performance Balancer
1970	Pontiac	GTO	6.6L	V8	N/A	Street Performance Balancer
1970	Pontiac	GTO	7.5L	V8	N/A	Street Performance Balancer
1970	Pontiac	LeMans	6.6L	V8	N/A	Street Performance Balancer
1970	Pontiac	LeMans	7.5L	V8	N/A	Street Performance Balancer
1970	Pontiac	LeMans	5.7L	V8	N/A	Street Performance Balancer
1969	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1969	Pontiac	Bonneville	7.0L	V8	N/A	Street Performance Balancer
1969	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1969	Pontiac	Catalina	7.0L	V8	N/A	w/o Ram Air; Street Performance Balancer
1969	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1969	Pontiac	Firebird	5.7L	V8	N/A	Street Performance Balancer
1969	Pontiac	Grand Prix	6.6L	V8	N/A	Street Performance Balancer
1969	Pontiac	Grand Prix	7.0L	V8	N/A	Street Performance Balancer
1969	Pontiac	GTO	6.6L	V8	N/A	Street Performance Balancer
1969	Pontiac	LeMans	6.6L	V8	N/A	Street Performance Balancer
1969	Pontiac	LeMans	5.7L	V8	N/A	Street Performance Balancer
1968	Pontiac	Bonneville	6.6L	V8	N/A	Street Performance Balancer
1968	Pontiac	Bonneville	7.0L	V8	N/A	Street Performance Balancer
1968	Pontiac	Catalina	6.6L	V8	N/A	Street Performance Balancer
1968	Pontiac	Catalina	7.0L	V8	N/A	Street Performance Balancer
1968	Pontiac	Firebird	6.6L	V8	N/A	Street Performance Balancer
1968	Pontiac	Firebird	5.7L	V8	N/A	Street Performance Balancer
1968	Pontiac	Grand Prix	6.6L	V8	N/A	Street Performance Balancer
1968	Pontiac	Grand Prix	7.0L	V8	N/A	Street Performance Balancer
1968	Pontiac	GTO	6.6L	V8	N/A	Street Performance Balancer
1968	Pontiac	LeMans	6.6L	V8	N/A	Street Performance Balancer
1968	Pontiac	LeMans	5.7L	V8	N/A	Street Performance Balancer
No rows match your filter.

Directly replaces or cross-references 3 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Dorman — 594-158SPioneer — 872011Pioneer — DA-4551HD

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