Blower Special 302, 5.0, 351W Ford 28oz Harmonic Damper

1/4"
3/16"
No Second Keyway

Fits Ford 1968-80 302 & 351 Windsor V8
Blower Special with 2.065" Seal Dimension for increased strength in Hub
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 Ford harmonic damper can split in the keyways when driving a supercharger. We increase the O.D. of the harmonic damper where it passes through the oil seal, to provide a great improvement in strength for the damper and crankshaft in this highly-stressed area. Adding the 2.065" oil seal dimension to this damper is ideal to increase strength where it is needed most.
Supercharger Upgrade Replacement for Ford M-6316-K351 & Equivalent*
Requires Larger I.D. Oil Seal (Fits Stock Timing Cover; Options Below):
Timken 332134 (or National 332134); NAPA NOS 20520 (or SKF CR 20520)
OE-Style 4-Bolt Face (3.30" Bolt Circle, 2.37" Register)
Early & Late Style Timing Marks
28oz. External Balance
6.4" O.D.
4.125" Overall Length (3.950" to pulley surface)
8.7 lbs. Gross Weight
Billet Steel Construction
SFI 18.1 Certified
Dual Keyways Standard: Select either 1/4", 3/16", or No Second Keyway

Product 11/26

Custom Left Slide Out