POWERBOND PERFORMANCE 20% UNDERDRIVE PULLEY KIT TO SUIT HOLDEN ALLOYTEC SIDI LY7 LE0 LW2 LLT 3.6L V6This Powerbond Race series 20% underdrive balancer kit suits Holden vehicles fitted with Alloytec LY7, LE0, LW2 & SIDI LLT 3. 6L V6 engines. This Underdrive balancer kit produces more horsepower by reducing parasitic power loss from driving engine accessories including alternator, power steering and air conditioning and the smaller diameter harmonic balancers reduce inertia for faster engine acceleration. The Powerbond SFI Race harmonic balancer