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. 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.
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