[PN: 650401] Fluidampr Pontiac 389 400 421 428 455 CID V-8 Steel Internally Balanced Damper

MSRP: $663.00

$563.55

( saved $99.45 )

Product Description

389, 400, 421, 428, 455 CID V-8

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.

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