SLP 04-06 GTO Harmonic Balancer/Underdrive Pulley
SLPs new 25% underdrive balancer for LS1 GTOs incorporates a number of high-quality features you wont 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 LS1 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