PowerBond 25% Underdrive Pulley/Harmonic Balancer - 1997-2013 Chevy Corvette (LS1, LS2, LS6, LS3) & 2008-2009 Pontiac G8 GT & GXP

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Now: $182.95
Was: $219.95


Powerbonds's 25% underdrive balancer for the LS1/LS6/LS2/LS3 Corvette and 2008-09 L76 Pontiac G8 and 2009 GXP incorporates a number of high-quality features you won't find on any other aftermarket unit. Chief among them are a pair of extra-tall belt-retention walls that eliminate the belt-slippage issues common to other balancers. Gains of up to 10 horsepower can be expected. Other unique design strengths include 100% steel construction (other brands use steel and aluminum), integral timing marks, and built-in puller-mounting threads. 

This is the same pulley SLP sold for several years!

NOTE: Balancer requires two new belts!

Pontiac G8/GXP
Main Belt: 6PK1860 or Equivalent
Accessory Belt: 4PK1050 or Equivalent

C5/C6 Corvette
Main Belt: Gates 6PK1900 or Equivalent
Accessory Belt: Gates 4PK1040 or Equivalent


  • Extra-tall belt-retention "walls"-no more thrown belts! 
  • No aftermarket tensioner required 
  • 100% steel construction 
  • Lighter than the stock balancer 
  • Integral timing marks and puller-mounting threads 
  • Keyed for high-rpm or supercharged applications 
  • Does not cause false knock retard or erratic power-curve dips 
  • Includes a new balancer bolt 
  • SFI Approved
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