Fluidampr 830111 Performance Damper for 06-10 GM 6.6L Duramax LBZ/LMM

Vehicle Fitment

• 2006-2010 GM / Chevrolet / GMC 6.6 L Duramax V8 Diesel - LBZ & LMM engines
• Applications include Silverado HD 2500/3500, Sierra HD 2500/3500, Express 2500/3500, Savana 2500/3500 and other GM 3/4-ton & 1-ton trucks/vans using 6.6 L Duramax

Features

• Viscous damper design - controls destructive crankshaft torsional vibrations across full RPM range
• Externally balanced steel damper - eliminates rubber-style failure found in stock dampers
• Precision CNC-machined, computer-balanced components for smooth, vibration-free operation
• Durable black zinc finish for corrosion resistance and long-term durability
• Engraved timing marks for accurate ignition/timing reference
• SFI 18.1 safety certification - built to meet performance and competition standards
• Maintenance-free - no periodic tuning or rebuild required
• Improves engine longevity - reduces stress on crankshaft, bearings, timing components under heavy load or high torque conditions

Specifications

• Outside Diameter: ~8-3/8"
• Bore Diameter: 1.9300"
• Finish: Steel with black zinc chromate coating
• Engine Balance: External
• Keyway: Single (5 mm)
• Overall length/depth: ~2.66-2.78"
• Weight: ~26-27 lb (rotating damper weight per Fluidampr spec sheet)
• Safety / Compliance: SFI 18.1 certified
• Position: Crankshaft front pulley / harmonic damper

Included Components

• 1x Fluidampr 830111 Performance Diesel-Series Damper (steel, black zinc finish, externally balanced)

Product Description

The Fluidampr 830111 is a heavy-duty performance dampener designed specifically for GM's 6.6 L Duramax LBZ and LMM engines (2006-2010). Unlike stock rubber-style dampers that lose effectiveness over time - especially under heavy loads, high torque, or frequent towing - this viscous damper uses a fluid-coupled internal design and CNC-machined steel housing to absorb and dissipate harmful crankshaft torsional vibrations across the entire RPM spectrum. That translates into smoother engine operation, reduced stress on internal components, and longer engine life even under severe workloads.

Engineered for serious duty - whether hauling, towing, or pushing a high-output diesel - the 830111 is SFI 18.1-certified and computer-balanced for reliable, maintenance-free performance. The engraved timing marks help ensure accurate ignition and timing settings, while the robust steel and corrosion-resistant finish ensures durability in harsh environments. If you're running a stock or modified 6.6 L Duramax LBZ/LMM and want maximum protection for the crankshaft, bearings, and valvetrain - this damper is a worthwhile and long-term investment.