PowerBond Race Serpentine Underdrive SFI 18.1 Harmonic Balancer - 6.220 in OD - Black Powder Coat - Internal Balance - GM LS-Series 28125BK Uses a square GM-style key

Uses a square GM-style key

Scanner Case

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PowerBond Race Serpentine Underdrive SFI 18.1 Harmonic Balancer - 6.220 in OD - Black Powder Coat - Internal Balance - GM LS-Series 28125BK Uses a square GM-style keyProduct 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.