Blower Special 7" SB Chevrolet Harmonic Damper

1/4"
3/16"
No Second Keyway

Fits Chevy Small Block V8
The added side load created by driving most superchargers adds a great deal of stress to the harmonic damper and crank snout (pulling on the damper). A stock-dimension small block Chevy harmonic damper can split in the keyways when driving a supercharger. Increasing the O.D. of the harmonic damper where it passes through the oil seal provides a great improvement in strength for the damper and crankshaft. Adding the big block Chevy oil seal dimension to this damper is ideal to increase strength where it is needed most.
Blower Special with Dual Bolt Pattern, 6-Bolt 2.80" Bolt Circle Pattern & Chevy Small Block 3-Bolt Face with 2" Register
Chevy Big Block Front Oil Seal Dimension
Internal Balance
6.7" O.D.
2.49" Overall Length
0.975" Timing Gear Surface to Rear of Inertia Ring
6.8 lbs. Gross Weight
Billet Steel Construction
SFI 18.1 Certified
Dual Keyways Standard: Select either 1/4", 3/16", or No Second Keyway

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Custom Left Slide Out