Designed just for mildly built Ford - Streetdampr harmonic dampers use silicone fluid in a sealed, laser-welded housing to control crankshaft vibration at all engine rpm, just like their race-ready brothers. That means more accurate spark and valve timing and reduced bearing and valvetrain wear. About the only difference between the Streetdampr and Fluidampr is that the Streetdamprs are not SFI-approved for racing.


If you decide to competitively race your Streetdampr equipped car. Be aware, most race sanction organizations require the harmonic balancer to meet SFI 18.1 specifications. While a Streetdampr is manufactured and functions to the same high standards as a Fluidampr, it does not receive official SFI 18.1 testing, marking or certificate necessary to pass race tech inspection. This is done to keep Streetdampr an economical option for non-race restoration projects and street rods.



PART # 620200
Fitment Ford 289, 302, 351, 400ci V8. External balance, 28oz. 4 bolt standard Ford pulley bolt pattern. Pulley space #717656 may be required on some 1975-later engines. Custom pulleys may be required on 1969 & earlier engines.
Bore Diameter 1.3745"
Degree Marking Range 2 degree increments, 50 BTDC to 10 ATDC
Degree Markings Engraved
Engine Balance External (28 oz)
Finish No Finish
Keyway Single; (3/16")
Length 3.500"
Material Steel
Mounting Hardware Included No
Outside Diameter 6-1/4"
Safety Rating Not SFI Approved
Weight / Rotating Weight 10.1 lbs / 6.7 lbs