PowerBond Race Serpentine Underdrive SFI 18.1 Harmonic Balancer - 6.220 in OD - Black Powder Coat - Internal Balance - GM LS-Series 4031 AFCOs Dual Stage Coil-Over assembly

AFCOs Dual Stage Coil-Over assembly provides variable spring rates that can be used to improve traction and handling in the slickest of conditions

6L80 / 6L90 Transmissions

rods and stems aligned

In addition to designing our wide range of after-market headers and exhausts

PowerBond Race Serpentine Underdrive SFI 18.1 Harmonic Balancer - 6.220 in OD - Black Powder Coat - Internal Balance - GM LS-Series 4031 AFCOs Dual Stage Coil-Over assemblyProduct Description: Harmonic Balancer Race Serpentine Underdrive 6. 220 in OD SFI 18. 1 Steel Black Powder Coat Internal Balance GM LS Series Sold Individually PowerBond produces steel harmonic balancers that are designed to outperform conventional harmonic balancers without the weight penalty of many competitive balancers.