SLP’s new 25% underdrive balancer for LS1 GTOs incorporates a numberof high-quality features you won’t find on any other aftermarket unit.Chief among them are a pair of extra-tall belt-retention walls thateliminate the belt-slippage issues endemic to other LS1 balancers (see photo).Other unique design strengths include 100% steel construction (other brandsuse steel and aluminum), integral timing marks, and built-in puller-mountingthreads. 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.
FEATURES
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
\ 
