ATI Shell Assembly 7.425in Steel 6-Groove External Balance 3 Ring (20012005 Duramax LB7 & LLY Diesel) ATI917371S
Replacement Steel Shell Assembly for 20012005 Duramax LB7 & LLY Engines
The ATI 7.425-inch Steel Shell Assembly (part ATI917371S) is designed as a direct-fit replacement shell for ATI Super Dampers used on 20012005 Duramax LB7 and LLY 6.6L diesel engines. Built from high-strength steel and featuring a 6-groove pulley layout with external balance, this shell maintains factory alignment and damping characteristics while restoring peak performance to worn or serviced damper assemblies.
Performance Highlights
- 7.425-inch outer diameter matches ATI Super Damper dimensions for 20012005 Duramax diesels
- 6-groove pulley configuration supports OEM accessory belt routing
- External balance design for precise crankshaft control in Duramax engines
- High-strength steel construction ensures long-term durability and vibration resistance
- Designed for service replacement of ATI917371 Super Damper assemblies
Quick Specs
- Outer Diameter: 7.425 inches
- Material: Steel
- Pulley Layout: 6-Groove
- Design: 3-Ring Shell Assembly
- Balance Type: External
- Engine Compatibility: Duramax LB7 & LLY (6.6L Diesel)
- Use: Replacement Shell for ATI Super Damper
- Part Number: ATI917371S
Why Choose ATIs Replacement Shell Assembly?
The ATI917371S allows diesel enthusiasts and shops to refresh existing ATI Super Dampers without replacing the full unit. Built from precision-machined steel and balanced to ATIs exact standards, this shell restores optimal vibration control and pulley alignment. Perfect for maintenance cycles or rebuilds on hard-working or high-performance Duramax trucks.
Frequently Asked Questions
Is this a complete damper or just the outer shell?
This is a replacement shell assembly for the ATI Super Damper, not a full harmonic damper unit.
Will it fit both LB7 and LLY Duramax engines?
Yes. Its designed for 20012005 Duramax LB7 and LLY 6.6L applications using the ATI917371 Super Damper.
Does it maintain external balance like the OEM damper?
Yes. It features the same external balance configuration as the factory and ATI917371 unit.
Is it SFI certified?
The certification applies to the complete damper assembly; when paired with the proper ATI hub and components, it meets SFI 18.1 standards.
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
- 20012005 GMC Sierra 2500HD / 3500HD Duramax LB7 & LLY 6.6L Diesel
Contact Beefcake Racing
Beefcake Racing is your trusted source for ATI Super Damper components and diesel performance parts. For assistance selecting the right damper or replacement shell, email sales@beefcakeracing.com or call 1-855-827-7223. Our team can help you get your Duramax back to peak performance.
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