Dayco PBU1117SS10 Engine Harmonic Balancer

Dayco Race Performance Underdrive Balancer

The Dayco PBU1117SS10 is a race performance engine harmonic balancer built for GM LS applications that need a 10% underdrive setup. It combines a neutral balance design with dual integrated serpentine pulleys, timing marks, and a steel outer ring for precise accessory drive control.

Key Features

• Race Performance 10% Underdrive line for reduced accessory drive speed
• Neutral balance design with no counterweight
• Steel outer ring for durability in performance use
• Two integrated serpentine pulleys: 4-groove and 6-groove
• Timing marks included for setup and service reference
• Crank bore measures 1.481 in. / 37.60 mm
• Overall outside diameter measures 7.225 in. / 183.50 mm
• Overall width measures 2.817 in. / 71.55 mm
• Installation instructions included

Detailed Description

Dayco Race Performance 10% Underdrive products are built for enthusiasts who want a performance-oriented accessory drive configuration without changing the basic engine layout. The PBU1117SS10 harmonic balancer uses a steel outer ring, neutral counterweight balance, and dual serpentine pulley sections to support LS-based engine setups in Chevrolet Corvette, Chevrolet Caprice, Chevrolet SS, Pontiac G8, and Cadillac CTS applications. The part number PBU1117SS10 is a direct reference for buyers searching for a Dayco underdrive harmonic balancer for GM performance vehicles.

This part cross-references Pioneer 872050 for the same application. The balancer includes timing marks and a 3-bolt hole pattern, with no crank trigger/exciter plate and no woodruff key included. For shoppers comparing Dayco PBU1117SS10 against other GM LS harmonic balancers, the listed dimensions and pulley groove counts are important for confirming accessory drive and crankshaft fitment before installation.

Vehicle Fitment

• Fits 2011-2017 Chevrolet Caprice, N/A, Race Performance 10% Underdrive
• Fits 2014-2017 Chevrolet SS, N/A, Race Performance 10% Underdrive
• Fits 1997-2013 Chevrolet Corvette, N/A, Race Performance 10% Underdrive
• Fits 2008-2009 Pontiac G8, N/A, Race Performance 10% Underdrive
• Fits 2004-2007 Cadillac CTS, N/A, Race Performance 10% Underdrive

What It Helps Address

• Accessory drive speed that is higher than desired for performance tuning
• Need for a replacement GM LS harmonic balancer with timing marks
• Crankshaft vibration control in compatible engine builds
• Fitment issues when matching pulley groove count and balancer dimensions
• Service replacement needs for Chevrolet Corvette, Chevrolet SS, Chevrolet Caprice, Pontiac G8, and Cadillac CTS applications

Installation Notes

Confirm crank bore, nose diameter, overall diameter, and pulley configuration before installation. Use the included instructions for setup, and verify timing mark alignment during assembly. Hardware is not included, so existing or application-specific fasteners must be sourced separately as required by the vehicle and engine build.

Quality Assurance

Dayco backs this Race Performance balancer with product engineering focused on performance drivetrain applications. The steel outer ring, neutral balance design, and clearly defined dimensions support accurate selection for LS-based GM vehicles when matched to the correct application.