Engine Kits

6.9" Damper for ' 61-79' Pontiac 326, 350, 389, 400, 421, 428 and 455
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6.9" Damper for ' 61-79' Pontiac 326, 350, 389, 400, 421, 428 and 455

Part #: 80020
List Price: $137.98
Our Price: $68.99
You Save: $68.99

6.9" Damper for ' 61-79' Pontiac 326, 350, 389, 400, 421, 428 and 455 engines.This damper is dimensionally the same as the 1969 through 1979 stock damper. To fit this damper on a 1961-'68 engine requires the use of '79 or later timing chain cover, water pump and related accessories.This damper has the stock accessory pulley bolt circle plus a BB Chevy accessory bolt circle.

PowerForce+Plus great new street dampers are made from extremely tough nodular iron and are suitable for all street applications and mild (non SFI) racing applications. These dampers are designed to be safely revved to as high as 6,000 rpm.

PowerForce+Plus dampers are of the highest quality and are precision machined to tolerances tighter than OEM. They come with a gloss black paint finish and white timing marks for easier reading. Externally balanced dampers feature bolt-in counterweights that are precision balanced. Counterweights are included with all external dampers.

What is Bonding?When dampers are bonded, what does this mean? It means that the elastomer (rubber) that is sandwiched between the ring and the hub is bonded, or vulcanized, to metal. This is similar to the process used to bond the metal motor mounts to the rubber vibration isolaters used in these mounts.  This greatly increases the safety of the damper as most stock, and many inexpensive aftermarket dampers, are just pressed together and under heavy duty applications, the ring can rotate, moving your TDC mark from the true position, or fly off the engine. And that is very bad!


Balance Style Neutral
Brand Professional Products
Degree Marking Range 60 BTDC to 0 TDC
Degree Markings Yes
Engine Balance Internal
Harmonic Balancer Construction Elastomer
Harmonic Balancer Finish Black anodized
Harmonic Balancer Material Nodular iron
Mounting Hardware Included No
Notes All 1961 to 1968 applications require 1969 or later timing chain cover, water pump, pulleys, and related accessories.
Outside Diameter (in) 6.900 in.
Part Type Harmonic Balancers
Product Line Professional Products PowerForce Harmonic Dampers
Quantity Sold individually.
Safety Rating Not SFI-approved