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Vehicle Info NeededSLPPART NUMBER: 847-100225
Harmonic Balancer/25% Underdrive Pulley 1997-13 Corvette LS1/LS6/LS2
$21499
Ships on 11/10/2026
Lowest Price GuaranteeGM
- Harmonic Balancer/25% Underdrive Pulley
- 1997-13 Corvette LS1/LS6/LS2
- SLP's 25% underdrive pulley balancer for GTOs incorporate 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 endemic to other GTO balancers. Other unique underdrive pulley design strengths include 100% steel contruction (other brands use steel and aluminum), integral timing marks, and built-in puller-mounting threads. SLP Harmonic Balancer/Underdrive Pulleys include a new balancer bolt and detailed installation instructions.
- 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
- GM balancers include a new balancer bolt
Features:
Part TypePulley Kit
Product LineSLP Harmonic Balancer/Underdrive Pulley
BrandSLP
Package Height7.5
Package Width8.3
Package Length12.3
Weight11.36 PG
Part CategoryPerformance Parts
Underdrive Ratio25% Reduction in Accessory Drive Speed
Product TypeUnderdrive Crank Pulley and Harmonic Balancer
Material100% Steel, SFI Approved
Vehicle Application1997-2009 GM LS1/LS2/LS6/LS3 (Corvette C5/C6, Pontiac G8)
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
