Pontiac / Oldsmobile

Normal stock dampers wear out and engine performance upgrades increase naturally occurring harmful crankshaft torsional vibrations. Install a Fluidampr viscous damper to reduce wear on the main bearings and timing gear, achieve more accurate valvetrain operation and lower the risk of crank failure. Unlike rubber based dampers, Fluidampr automatically adapts to any engine modifications and constantly self-tunes in real time to protect across the entire RPM range. Features precision machined and computer balanced components that never need to be tuned or rebuilt.

SFI Approved / ISO 9001 Certified / Made in the USA

Pontiac / Oldsmobile V-8
326, 389, 400, 421, 428, 455

Internally Balanced
PART # 650401
Fitment 1959-1979 Pontiac / Oldsmobile. 326, 389, 400, 421, 428, 455 V8. Internal balance. 4 bolt pulley pattern on 3.300 bolt circle. Holes in pulley must be re-drilled, '69-later timing cover & pulley may be required on early models.
Bore Diameter 1.3720"
Degree Marking Range 50 BTDC to 10 ATDC. Additional timing/degree marks at 90, 180 and 270
Degree Markings Engraved
Engine Balance Internal
Finish Black Zinc
Keyway Single; (3/16")
Length 3.247"
Material Steel
Mounting Hardware Included No
Outside Diameter 6-5/8"
Pulley Bolt Pattern 4 bolt pattern on 3.300 circle. Holes in pulley must be re-drilled. 1969-later timing cover & pulley may be required on earlier models.
Safety Rating SFI 18.1
Weight / Rotating Weight 10.2 lbs / 6.8 lbs

Pontiac Iron Duke 4 Cylinder

Internally Balanced
PART # 620101
Fitment GM / Chevy / Buick / Pontiac small block. 262ci-350ci, 409ci V8. Internal balance. Will not fit LT1 '92-later.
Bore Diameter 1.2450"
Degree Marking Range 50 BTDC to 10 ATDC. Additional timing/degree marks at 90, 180 and 270
Degree Markings Engraved
Engine Balance Internal
Finish Black Zinc
Keyway Single; (3/16")
Length 2.335"
Material Steel
Mounting Hardware Included No
Outside Diameter 6-1/4"
Safety Rating SFI 18.1
Weight / Rotating Weight 8.0 lbs / 5.3 lbs

Oldsmobile V-8

Externally Balanced
PART # 650501
Fitment Oldsmobile 350, 400, 403, 425, 455. External balance.
Bore Diameter 1.4973"
Degree Marking Range 50 BTDC to 10 ATDC. Additional timing/degree marks at 90, 180 and 270
Degree Markings Engraved
Engine Balance External (25 oz)
Finish Black Zinc
Keyway Single
Length 3.200"
Material Steel
Mounting Hardware Included No
Outside Diameter 6-5/8"
Safety Rating SFI 18.1
Weight / Rotating Weight 12.5 lbs / 8.3 lbs