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Upgrade your 1991–1998 Mitsubishi, Plymouth, or Eagle 4G63/T DSM engine with the Fluidampr Performance Damper (Part #630701) for improved reliability and long-term engine protection. Stock rubber dampers wear out over time, and performance upgrades can amplify crankshaft torsional vibrations. The Fluidampr viscous damper effectively reduces these harmful vibrations to protect main bearings, timing components, and crankshafts—while ensuring smoother, more accurate valvetrain operation.
Unlike traditional rubber-based dampers, Fluidampr automatically adapts to any engine modification and continuously self-tunes across the full RPM range. Each unit is precision CNC-machined, computer balanced, and designed for maintenance-free operation, ensuring reliable performance under both street and racing conditions
Reduces destructive crankshaft torsional vibrations
Extends the life of main bearings, timing gears, and crankshafts
Improves valvetrain accuracy and stability
Self-tuning design adapts to engine modifications in real time
CNC-machined and computer-balanced steel construction
Maintenance-free and rebuild-free operation
SFI 18.1 certified for performance and safety
| Specification | Detail |
|---|---|
| Part Number | 630701 |
| Fitment | 1991–1998 Mitsubishi / Plymouth / Eagle 4G63/T DSM |
| Bore Diameter | 1.7328" |
| Degree Marking Range | 2 timing marks, 180° apart |
| Degree Markings | Engraved |
| Engine Balance | Internal |
| Finish | Black Zinc |
| Keyway | Not Applicable |
| Length | 1.807" |
| Material | Steel |
| Mounting Hardware Included | No |
| Outside Diameter | 6-3/8" |
| Safety Rating | SFI 18.1 |
| Weight / Rotating Weight | 7.7 lbs / 5.1 lbs |
1991–1998 Mitsubishi 4G63/T DSM
1991–1998 Plymouth 4G63/T DSM
1991–1998 Eagle 4G63/T DSM
