Fluidampr 910302 11% Overdrive Harmonic Damper for 2015-2023 6.2L Hellcat HEMI

Vehicle Fitment

• 2015-2023 Dodge Challenger SRT Hellcat / Redeye / Super Stock (6.2L Supercharged HEMI V8)
• 2015-2023 Dodge Charger SRT Hellcat / Redeye / King Daytona (6.2L Supercharged HEMI V8)
• 2018-2021 Dodge Challenger SRT Demon (6.2L Supercharged HEMI V8)
• 2018-2023 Dodge Durango SRT Hellcat (6.2L Supercharged HEMI V8)
• 2018-2021 Jeep Grand Cherokee Trackhawk (6.2L Supercharged HEMI V8)
• 2021-2023 Ram 1500 TRX (6.2L Supercharged HEMI V8)

Fitment Notes

• For use on 6.2L Supercharged HEMI V8 engines only - this is an 11% overdrive (larger than OEM) crank pulley; a shorter supercharger drive belt is required and NOT included
• The 11% overdrive pulley increases supercharger speed, adding approximately 2.5 lbs of additional boost over stock
• For OEM/stock-size replacement, order Fluidampr 840302 instead
• Internally balanced design - direct replacement for factory harmonic balancer
• SFI 18.1 certified - required for sanctioned racing events
• Professional installation recommended; crankshaft bolt must be torqued to factory spec

Features

• 11% overdrive crank pulley increases supercharger drive speed, delivering approximately 2.5 lbs of additional boost without any other hardware changes
• Proprietary viscous damper technology automatically self-tunes in real time across the entire RPM range - unlike rubber dampers that degrade and lose effectiveness over time or with heat
• Eliminates destructive crankshaft torsional vibration that increases with engine modifications, reducing wear on main bearings, timing components, and the crankshaft itself
• Precision CNC machined and computer-balanced using high-grade steel and aluminum components for exact mass distribution and concentricity
• Corrosion-resistant black anodized pulley and black zinc hub finish with engraved timing marks for easy timing reference
• No maintenance, tuning, or rebuilding required - designed for long-term service life
• SFI 18.1 certified for sanctioned competition use
• Made in the USA by Vibratech TVD, manufacturer of OEM viscous dampers for exotic automotive, marine, and defense applications

Specifications

• Part Number: 910302
• Engine Fitment: 6.2L Supercharged HEMI V8 (Chrysler/SRT/Stellantis)
• Pulley Size: 11% Overdrive (larger than OEM, increases supercharger speed)
• Balance Type: Internal
• Damper Technology: Viscous fluid (silicone-based - self-tuning, broad RPM range)
• Construction: High-grade steel hub, aluminum damper ring
• Hub Finish: Black zinc with engraved timing marks
• Pulley Finish: Black anodized
• Certification: SFI 18.1
• Maintenance Required: None
• Country of Origin: USA

Included Components

• 1x Fluidampr 910302 Viscous Harmonic Damper (11% Overdrive Crank Pulley)
• Installation Instructions
• Note: Shorter supercharger belt required - not included

Product Description

The Fluidampr 910302 is a viscous harmonic damper and 11% overdrive crank pulley engineered for all 6.2L Supercharged HEMI V8 applications - including the Dodge Challenger, Charger, Demon, and Durango SRT Hellcat variants, the Jeep Grand Cherokee Trackhawk, and the Ram 1500 TRX. The 11% overdrive sizing spins the supercharger faster than stock, delivering approximately 2.5 additional lbs of boost without additional hardware. Unlike OEM rubber-bonded dampers that harden, crack, and lose effectiveness over time - especially under the heat and vibration generated by the 6.2L's supercharged output - the Fluidampr uses a sealed silicone viscous fluid chamber that automatically self-tunes to the engine's torsional resonance in real time across the entire RPM band.

Every engine modification - pulley swap, tune, heads, cam - increases naturally occurring crankshaft torsional vibrations that rubber dampers cannot adequately control. The Fluidampr's viscous design adapts to any engine configuration without requiring rebuilding or retuning, protecting the crankshaft, main bearings, and timing components for the life of the engine. Precision CNC machined and computer balanced from high-grade steel and aluminum, it drops directly in as an internally balanced replacement for the factory harmonic balancer. SFI 18.1 certified for sanctioned racing use. A shorter supercharger drive belt is required when installing the 910302 - not included. Made in the USA.