PowerBond Race Serpentine Underdrive SFI 18.1 Harmonic Balancer - 6.220 in OD - Black Powder Coat - Internal Balance - GM LS-Series 4031 Bearings / Races / Seals

Bearings / Races / Seals

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

For mounting applications where you have a thicker roof and require a thicker NMO mount up to a 1/2" thick

PowerBond Race Serpentine Underdrive SFI 18.1 Harmonic Balancer - 6.220 in OD - Black Powder Coat - Internal Balance - GM LS-Series 4031 Bearings / Races / SealsProduct 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.