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2004-06 GTO Underdrive Pulley


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2004-06 GTO Underdrive Pulley

SLP's new 25% underdrive balancer for LS1 GTOs 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 endemic to other LS1 balancers (see photo). Other unique design strengths include 100% steel construction (other brands use steel and aluminum), integral timing marks, and built-in puller-mounting threads. Includes a new balancer bolt and detailed installation instructions.

NOTE: Requires 2 new belts (Dayco # 760K6 and # 405K4 or equivalent, not included). For GTOs only.


* 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

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