Pioneer Cables DA-4551 Engine Harmonic Balancer

OE Replacement Harmonic Balancer for Pontiac V8 Applications

Pioneer Cables DA-4551 is an OE replacement engine harmonic balancer built for select Pontiac, Buick, and Oldsmobile applications. It follows original design dimensions for proper installation and balanced operation, with precision-machined components and bonded rubber constructed to original specifications.

The Pioneer Cables OE Replacement Balancer line focuses on direct-fit service parts for engines that need factory-style dimensions and dependable crankshaft damping. Part number DA-4551 is a standard replacement harmonic balancer for classic GM applications where correct outside diameter, keyway fit, and pulley alignment matter.

Key Features

• OE replacement harmonic balancer for engine vibration control
• Precision machined and dynamically balanced assembly
• High-grade metal and rubber construction
• 4-groove pulley design with flat drive belt type
• Keyway included for correct crankshaft indexing
• Standard replacement grade for factory-style service
• Outside diameter: 6.75 in. / 172.5 mm
• Inside diameter: 1.375 in. / 35 mm
• Depth: 3.125 in. / 80 mm

Detailed Description

Pioneer Cables DA-4551 harmonic balancer is engineered to match OE design requirements so it installs properly and functions as intended on compatible classic GM engines. The balancer uses high-grade metals and bonded rubber, with each assembly precision machined and dynamically balanced for consistent crankshaft damping. This makes it a practical choice for restoring factory-style operation on vehicles such as Pontiac Firebird, Pontiac GTO, Pontiac Grand Prix, Pontiac LeMans, Pontiac Tempest, Pontiac Catalina, Pontiac Bonneville, Pontiac Grand Am, Pontiac Parisienne, Buick LeSabre, Oldsmobile 98, Oldsmobile Delta 88, and Oldsmobile Custom Cruiser applications listed below.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle Fitment

• Fits 1970-1979 Pontiac Firebird, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1968-1978 Pontiac Bonneville, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1968-1978 Pontiac Catalina, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1975-1977 Pontiac Grand LeMans, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1969-1977 Pontiac Grand Prix, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1968-1977 Pontiac LeMans, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1976 Pontiac Parisienne, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1968-1974 Pontiac Parisienne, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1975 Buick LeSabre, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1975 Oldsmobile 98, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1975 Oldsmobile Custom Cruiser, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1975 Oldsmobile Delta 88, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1973-1975 Pontiac Grand Am, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1973 Pontiac GTO, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1971 Pontiac GTO, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1972 Pontiac GTO, N/A; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1968-1970 Pontiac GTO, N/A; Part Type: Solid; Outer Diameter: 6.79 in; w/o Ram Air; OE Replacement Balancer
• Fits 1968-1970 Pontiac Tempest, N/A; Part Type: Solid; Outer Diameter: 6.79 in; OE Replacement Balancer
• Fits 1968-1969 Pontiac Firebird, N/A; Part Type: Solid; Outer Diameter: 6.79 in; w/o RAM Air; OE Replacement Balancer
• Fits 1968 Pontiac Grand Prix, N/A; Part Type: Solid; Outer Diameter: 6.79 in; w/o Ram Air; OE Replacement Balancer

Installation Notes and Tips

Verify crankshaft snout diameter, keyway alignment, pulley groove count, and overall balancer depth before installation. Confirm the application notes for solid-type engines and Ram Air exclusions where listed, and compare the original balancer dimensions to DA-4551 before assembly. Because bolt and washer are not included, reuse or source the correct fasteners separately if required by the vehicle.

Quality Assurance

Pioneer Cables builds this OE Replacement Balancer line to original design specifications using precision machining and dynamically balanced assemblies. That approach supports proper fitment and factory-style operation on compatible Pontiac, Buick, and Oldsmobile engines. Part number DA-4551 is identified for direct replacement service where the listed dimensions and fitment match the original component.