6.5 Inch Ford Y-Block Harmonic Balancer Internal Balance with Thunderbird Length Hub

6.75″ 455″ Oldsmobile Harmonic Balancer #501

$535.00 – $605.00

The dampers for the Oldsmobile 455 engines feature an OEM 4-bolt pulley pattern and male pulley register. The dampers have OEM offset. The #501 damper is designed for use with the OEM external balanced crankshaft. The damper may be used with an internal balance crankshaft by removal of the bolted on counter weight.

Outer Diameter: 6.75″
Weight: 7.4 lbs
Exceeds SFI 18.1 standards and is marked on front with SFI Sticker, and on the rear with SFI number stamped into unit.

Flying Magnet Option

Clear

Double 1/4" Keyway Add On

Dual 1/4" Keyways (Requires a Blower/Super Duty Hub or BBC Crank Snout) Required the crankshaft to be machined for a second keyway 180* out from the original keyway. *Requires damper purchase. This is a labor option for new damper purchase only.

Add for $30.00

SKU: 501 Category: OLDS