PowerBond Race Serpentine Underdrive SFI 18.1 Harmonic Balancer - 6.770 in OD - Black Powder Coat - Internal Balance - GM LS-Series Piston Rod Guide Extension Nitrous Oxide Fuel Line Adapter

Nitrous Oxide Fuel Line Adapter Kit

Nose Wing Front Post

1971-1974 Chevrolet G10 Van

For the ultimate 289 or 302ci small block Ford street car

39 mm Dish

PowerBond Race Serpentine Underdrive SFI 18.1 Harmonic Balancer - 6.770 in OD - Black Powder Coat - Internal Balance - GM LS-Series Piston Rod Guide Extension Nitrous Oxide Fuel Line AdapterProduct Description: Harmonic Balancer Race Serpentine Underdrive 6. 770 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.