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SKU: ATI917278 | UPC: 800157029707
ATI Damper 6.78in AL 6/4 Grv 10% Underdrive LS1/2/3/6 1997-2013 Corvette Y-Body A/C 3 Ring
This ATI crankshaft damper controls harmonic vibration in GM LS1 LS2 LS3 LS6 engines for 1997-2013 Chevrolet Corvettes. The 6.78-inch aluminum shell with 10% underdrive on 6-rib main and 4-rib A/C pulleys reduces accessory drag to increase horsepower and torque. SFI 18.1 certification provides reliability at high RPMs up to 10,000 in racing or street applications.
Key Features
- 6.78in Aluminum Shell: Weighs 6.8 lbs to lower rotational mass for faster engine revs and sharper throttle response
- 6/4 Groove 10% Underdrive: 6-rib serpentine and 4-rib A/C pulleys run accessories at reduced speed to cut power loss and engine bay heat
- 3-Ring Internal Balance Design: Matches OEM LS crankshaft neutral balance for direct fit with no vibration at high RPMs
- SFI 18.1 Certified: Bonded elastomer and steel hub withstand drag racing demands for consistent performance
- Precision CNC Machined: TDC mark and keyway ensure exact alignment on LS cranks for precise timing and stability
Product Notes
- Designed for vehicles equipped with factory A/C systems
- Use ATI crank pins ATI-915000 or equivalent for secure installation
- Ships in protective foam-lined box measuring 10in x 10in x 8in
Installation Notes
- Professional installation recommended.
- Remove OEM damper with harmonic balancer puller tool
- Torque to 240 ft-lbs using ATI installation tool ATI-9172 includes Woodruff key
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-2004 | Chevrolet | Corvette | All LS1/LS6 |
| 2005-2007 | Chevrolet | Corvette | All LS2 |
| 2008-2013 | Chevrolet | Corvette | All LS3 |
Why Choose ATI?
- Drag racing leader since 1964 with NHRA Pro Stock wins
- Bonded assembly survives 12,000 RPM abuse
- Made in USA with billet aluminum and high-grade elastomer
Frequently Asked Questions
-
Q: Does this fit 2008-2013 LS3 Corvettes with A/C?
A: Yes direct bolt-on for all 2008-2013 Chevrolet Corvettes with LS3 and factory A/C matches 6.78in crank pulley diameter -
Q: What material is the shell and hub?
A: 6061-T6 aluminum shell with steel inertia ring and hub black anodized finish resists corrosion -
Q: What warranty coverage applies?
A: ATI limited lifetime warranty against defects register online for full protection
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Secure foam-lined cardboard box 10 x 10 x 8 inches
- Weight: 6.8 lbs product weight
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