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Protect your 2011–2017 GM/Chevy 6.6L Duramax LML or LGH engine with the Fluidampr Performance Diesel Damper (Part #830121)—the same technology trusted by high-power diesel OEMs. This premium viscous damper provides superior, broad-range control of harmful crankshaft torsional vibrations to improve durability, reliability, and overall engine performance.
When upgrading your engine with performance modifications or stronger rotating assemblies, installing a Fluidampr helps reduce wear on critical internal components such as main bearings, timing gears, and crankshafts. Built with high-quality viscous silicone and precision CNC-machined, computer-balanced steel components, this damper delivers maintenance-free, consistent performance without the need for tuning or rebuilds.
Controls destructive crankshaft torsional vibrations
Protects main bearings, timing gears, and crankshafts
Designed for high-performance and upgraded diesel engines
Precision CNC-machined and computer balanced
Maintenance-free, no tuning or rebuild required
SFI 18.1 certified for performance and safety
Includes mounting washer; optional bolt kit available (p/n 300010)
| Specification | Detail |
|---|---|
| Part Number | 830121 |
| Fitment | 2011–2017 GM/Chevy 6.6L Duramax LML / LGH |
| Bore Diameter | 1.9300" |
| Degree Markings | Engraved |
| Engine Balance | External |
| Finish | Black Zinc |
| Keyway | Single (5mm) |
| Length | 2.66" |
| Material | Steel |
| Mounting Hardware Included | Yes – Washer included. Recommend Fluidampr High Strength Bolt Kit p/n 300010 |
| Outside Diameter | 8-3/8" |
| Safety Rating | SFI 18.1 |
| Weight / Rotating Weight | 25.0 lbs / 16.7 lbs |
2011–2017 GM / Chevy 6.6L Duramax LML
2011–2017 GM / Chevy 6.6L Duramax LGH
