Seller notes

1998-2002 Camaro/Firebird SLP LS1 25% Harmonic Balancer/Underdrive Crank PulleyIncludes a new GM crank bolt P/N 12557840 Installs in 30min for an additional 10HP!!! SLP's new 25% underdrive balancer for LS1 F-Bodies 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. Other unique design strengths include 100% steel constru...

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