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ATI Damper - 7.425" - Steel - 6 Groove - Neutral Balance - 3 Ring - Heavy Inertia (2001 - 2015 Duramax) ATI917378

ATI Damper - 7.425" - Steel - 6 Groove - Neutral Balance - 3 Ring - Heavy Inertia (2001 - 2015 Duramax) ATI917378

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Item#:
APPATI917378
$477.39
Price: $461.15
(You save $16.24 )
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UPC:
800157031779
Availability:
Special order
LTL:
N
MPN:
ATI917378
Product ID:
361338
Proposition 65:
N
Category:
Engine Components>Crankshaft Dampers
Core:
N
Clearance Item:
N

ATI Damper – 7.425in – Steel – 6-Groove – Neutral Balance – 3 Ring – Heavy Inertia (2001–2015 Duramax) – ATI917378

Heavy-Inertia Steel Super Damper for 2001–2015 Duramax 6.6L Diesel Engines

The ATI 7.425-inch Steel Heavy Inertia Super Damper (part ATI917378) is engineered for 2001–2015 Duramax 6.6L diesel engines. Featuring a neutral balance design and a 6-groove pulley configuration, this heavy-mass damper delivers outstanding harmonic control for modified and high-torque diesel applications. Designed for both street and competition use, it smooths out crankshaft harmonics, reduces vibration, and ensures consistent power delivery across the RPM range.

Performance Highlights

  • 7.425-inch outer diameter balances size and weight for optimal damping
  • Neutral balance design eliminates unwanted rotational imbalance
  • Heavy-inertia 3-ring steel construction provides superior torsional control under high load
  • 6-groove pulley layout maintains OEM belt alignment
  • SFI 18.1 certified and fully rebuildable for long-term durability

Quick Specs

  • Outer Diameter: 7.425 inches
  • Material: Steel
  • Pulley Layout: 6-Groove
  • Design: 3-Ring Heavy Inertia Super Damper
  • Balance Type: Neutral
  • Certification: SFI 18.1
  • Engine Compatibility: Duramax 6.6L Diesel (LB7, LLY, LBZ, LMM, LML)
  • Years: 2001–2015
  • Part Number: ATI917378

Why Choose ATI’s Heavy Inertia Duramax Super Damper?

The ATI917378 is the premium solution for controlling harmonics in Duramax engines that have been tuned, boosted, or modified for heavy loads. The neutral balance and heavy-inertia design offer improved smoothness, reduced crankshaft twist, and enhanced longevity for rotating components. Ideal for diesel racers and towing enthusiasts alike, this damper provides precision stability without compromising strength or reliability.

Frequently Asked Questions

What makes this damper “heavy inertia”?

It uses a denser steel core and heavier mass to increase damping effectiveness, ideal for high-boost or competition engines.

Does this fit all Duramax engines from 2001–2015?

Yes. It fits all 6.6L Duramax engines from 2001–2015, including LB7, LLY, LBZ, LMM, and LML variants.

Is this damper externally balanced?

No. The ATI917378 is a neutral-balanced unit, offering even harmonic control across all cylinders.

Can this damper be rebuilt or serviced?

Yes. All ATI Super Dampers, including this model, are fully rebuildable using genuine ATI service components.

Vehicle Fitment

  • 2001 Chevrolet Silverado 2500HD / 3500HD Duramax LB7 6.6L Diesel
  • 2002 Chevrolet Silverado 2500HD / 3500HD Duramax LB7 6.6L Diesel
  • 2003 Chevrolet Silverado 2500HD / 3500HD Duramax LB7 6.6L Diesel
  • 2004 Chevrolet Silverado 2500HD / 3500HD Duramax LLY 6.6L Diesel
  • 2005 Chevrolet Silverado 2500HD / 3500HD Duramax LLY 6.6L Diesel
  • 2006 Chevrolet Silverado 2500HD / 3500HD Duramax LBZ 6.6L Diesel
  • 2007 Chevrolet Silverado Classic 2500HD / 3500HD Duramax LBZ 6.6L Diesel
  • 2007 Chevrolet Silverado 2500HD / 3500HD Duramax LMM 6.6L Diesel
  • 2008 Chevrolet Silverado 2500HD / 3500HD Duramax LMM 6.6L Diesel
  • 2009 Chevrolet Silverado 2500HD / 3500HD Duramax LMM 6.6L Diesel
  • 2010 Chevrolet Silverado 2500HD / 3500HD Duramax LMM 6.6L Diesel
  • 2011 Chevrolet Silverado 2500HD / 3500HD Duramax LML 6.6L Diesel
  • 2012 Chevrolet Silverado 2500HD / 3500HD Duramax LML 6.6L Diesel
  • 2013 Chevrolet Silverado 2500HD / 3500HD Duramax LML 6.6L Diesel
  • 2014 Chevrolet Silverado 2500HD / 3500HD Duramax LML 6.6L Diesel
  • 2015 Chevrolet Silverado 2500HD / 3500HD Duramax LML 6.6L Diesel
  • 2001 GMC Sierra 2500HD / 3500HD Duramax LB7 6.6L Diesel
  • 2002 GMC Sierra 2500HD / 3500HD Duramax LB7 6.6L Diesel
  • 2003 GMC Sierra 2500HD / 3500HD Duramax LB7 6.6L Diesel
  • 2004 GMC Sierra 2500HD / 3500HD Duramax LLY 6.6L Diesel
  • 2005 GMC Sierra 2500HD / 3500HD Duramax LLY 6.6L Diesel
  • 2006 GMC Sierra 2500HD / 3500HD Duramax LBZ 6.6L Diesel
  • 2007 GMC Sierra Classic 2500HD / 3500HD Duramax LBZ 6.6L Diesel
  • 2007 GMC Sierra 2500HD / 3500HD Duramax LMM 6.6L Diesel
  • 2008 GMC Sierra 2500HD / 3500HD Duramax LMM 6.6L Diesel
  • 2009 GMC Sierra 2500HD / 3500HD Duramax LMM 6.6L Diesel
  • 2010 GMC Sierra 2500HD / 3500HD Duramax LMM 6.6L Diesel
  • 2011 GMC Sierra 2500HD / 3500HD Duramax LML 6.6L Diesel
  • 2012 GMC Sierra 2500HD / 3500HD Duramax LML 6.6L Diesel
  • 2013 GMC Sierra 2500HD / 3500HD Duramax LML 6.6L Diesel
  • 2014 GMC Sierra 2500HD / 3500HD Duramax LML 6.6L Diesel
  • 2015 GMC Sierra 2500HD / 3500HD Duramax LML 6.6L Diesel

Contact Beefcake Racing

Beefcake Racing is your source for ATI Super Dampers and Duramax performance parts. For assistance or to order, email sales@beefcakeracing.com or call 1-855-827-7223. Our experts can help you select the perfect damper for your Duramax build.

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