ATI Damper 7.425in Steel 6-Groove External Balance 3 Ring (20012005 Duramax LB7 & LLY Diesel) ATI917371
High-Performance Steel Super Damper for 20012005 Duramax LB7 & LLY Engines
The ATI 7.425-inch Steel Super Damper (part ATI917371) is engineered for 20012005 GM Duramax LB7 and LLY 6.6L diesel engines. Featuring a 6-groove pulley layout and external balance design, this damper delivers superior harmonic control for stock, tuned, and high-performance diesel trucks. Its designed to absorb damaging torsional vibrations, improving crankshaft stability, accessory belt life, and long-term engine reliability whether you tow, race, or daily drive your Duramax.
Performance Highlights
- 7.425-inch outer diameter ensures excellent harmonic damping for high-torque diesels
- 6-groove pulley configuration maintains OEM belt alignment
- External balance design built to match Duramax crankshaft dynamics
- All-steel, 3-ring construction delivers unbeatable strength and vibration absorption
- SFI 18.1 certified and fully rebuildable for long service life
Quick Specs
- Outer Diameter: 7.425 inches
- Material: Steel
- Pulley Layout: 6-Groove
- Design: 3-Ring Super Damper
- Balance Type: External
- Certification: SFI 18.1
- Engine Compatibility: Duramax LB7 & LLY (6.6L Diesel)
- Part Number: ATI917371
Why Choose ATIs Duramax LB7/LLY Super Damper?
The ATI917371 delivers professional-grade crankshaft stability for Duramax-powered trucks. Its 3-ring, all-steel design controls harmonic vibrations that can cause bearing wear, cracked pulleys, or timing irregularities under heavy load. Whether used in towing, off-road, or competition builds, this damper improves engine smoothness and reliability while meeting the highest safety and performance standards.
Frequently Asked Questions
Will this damper fit both LB7 and LLY engines?
Yes. The ATI917371 fits all 20012005 Duramax 6.6L diesel engines, including both LB7 and LLY models.
Is this damper SFI approved for racing?
Yes. Its SFI 18.1 certified for safety in competitive and high-RPM diesel applications.
Do I need to rebalance my engine after installation?
No. This damper is externally balanced and matches the factory Duramax balance design for direct-fit installation.
Can it be rebuilt?
Yes. All ATI Super Dampers are fully rebuildable with ATI service components for long-term use.
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 LB7 6.6L Diesel
- 2004 Chevrolet Silverado 2500HD / 3500HD Duramax LLY 6.6L Diesel
- 2005 Chevrolet Silverado 2500HD / 3500HD Duramax LLY 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 LB7 6.6L Diesel
- 2004 GMC Sierra 2500HD / 3500HD Duramax LLY 6.6L Diesel
- 2005 GMC Sierra 2500HD / 3500HD Duramax LLY 6.6L Diesel
Contact Beefcake Racing
Beefcake Racing is your trusted source for ATI Super Dampers and Duramax performance parts. For expert assistance or to place an order, email sales@beefcakeracing.com or call 1-855-827-7223. Our diesel specialists will help you choose the perfect damper for your setup.
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