Chevy 400 Harmonic Damper

Professional Products 80001 PowerForce harmonic damper-balancer.

Fits Chevy small block 400 which is an externally balanced engine.

6 3/4" in diameter.

Weights 7.59 pounds.

Made of 1045 steel with an accurate crank bore for proper press fit on the crankshaft.

Damper has less than .005 runout.



Sixty degrees of timing marks with an additional set of marks every 90 degrees.

Painted semi-gloss black with white etched timing marks.

SFI-Spec damper is available below.


Professional Products 80001 90001 Professional Products PowerForce Plus harmonic damper 6 3/4" Chevy 400 harmonic balancer 80001$79.97

Click to enlargeProfessional Products 90001 PowerForce Plus
Professional Products 9001 PowerForce Plus harmonic damper-balancer.

For the externally balance Chevy 400 cubic inch engine.

6 3/4" Diameter.

Weights 8.4 pounds.

SFI-Spec damper.

Both the hub and the inertia ring is made of 1045 steel.

Painted semi-gloss black with a red anodized ring, white etched timing marks.

Number 8-32 stainless steel machine screws.

High temperature elastomer for heavy duty racing use.

Sixty degrees of timing marks with an additional set every 90 degrees.

Accurate crank bore for proper press fit on the crankshaft.

Damper has less than .005 runout.

Bolt in counter weight. This removable external weight allows the damper to be converted to internal balance.

90001$179.97

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