C5 or C6, LS1/LS6/LS2/LS3/LS7 Underdrive Pulley Balancer SLP

SLP's new 25% underdrive balancer for Corvette's 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. Includes a new balancer bolt and detailed installation instructions.
*Extra-tall belt-retention "wall"-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
Note: Requires new Serpentine belt (Dayco #5060780 or equivalent, not included).

We have seen just over 9-11 Rear Wheel HP increase with this kit installed on nearly stock LS1s.