ATI Damper 5.67in Aluminum 6/4 Groove 25% UD No A/C 3 Ring (19972013 Corvette) ATI918847
High-Performance 25% Underdrive Super Damper for LS-Powered Corvettes
The ATI 5.67-inch Aluminum Super Damper (part ATI918847) is built for 19972013 Corvettes with LS-series engines. Featuring a 3-ring design and 6/4 groove pulley layout, this 1-piece underdrive damper delivers precision harmonic control while reducing accessory load by 25%. The result? Faster revs, less vibration, and more usable horsepower. Designed for performance street and track applications, it deletes the A/C drive for maximum efficiency and weight savings. Like all ATI Super Dampers, its SFI 18.1 certified and fully rebuildable for years of reliable use.
Performance Highlights
- 5.67-inch diameter ideal for compact LS engine bays
- 25% underdrive increases horsepower by reducing accessory drag
- 6/4 groove pulley setup for serpentine belt configurations
- 3-ring construction enhances vibration absorption and crankshaft protection
- No A/C drive for race-oriented simplicity and reduced parasitic loss
- Precision aluminum build for strength and reduced rotating mass
- SFI 18.1 certified for legal competition and safety compliance
- Fully rebuildable for long-term performance and serviceability
Quick Specs
- Outer Diameter: 5.67 inches
- Material: Aluminum
- Pulley Style: 6/4 Groove
- Design: 3 Ring, 1-Piece
- Underdrive: 25% Reduction
- A/C: Deleted (No A/C)
- Certification: SFI 18.1
- Part Number: ATI918847
Why Choose ATIs 25% Underdrive Corvette Super Damper?
The ATI918847 Super Damper is specifically tuned for the LS-powered Corvette platform. By eliminating A/C and reducing accessory speeds, this damper improves throttle response, balances crank harmonics, and helps prevent engine wear under high-RPM conditions. Whether youre building a street-performance C5 or a full race-prepped C6, ATIs proven elastomer technology delivers unmatched smoothness, balance, and power efficiency.
Frequently Asked Questions
Can this damper be used on a stock LS engine?
Yes. The ATI918847 fits OEM LS configurations and enhances performance even on stock engines.
Does this model support A/C?
No. This version is designed for builds without air conditioning to maximize power and simplicity.
What are the benefits of a 25% underdrive pulley?
It reduces accessory drag, typically freeing up 510 horsepower while improving throttle response and efficiency.
Is the damper rebuildable?
Yes. Like all ATI Super Dampers, its fully rebuildable for long-term reliability and performance tuning.
Fitment
- 1997 Chevrolet Corvette
- 1998 Chevrolet Corvette
- 1999 Chevrolet Corvette
- 2000 Chevrolet Corvette
- 2001 Chevrolet Corvette
- 2002 Chevrolet Corvette
- 2003 Chevrolet Corvette
- 2004 Chevrolet Corvette
- 2005 Chevrolet Corvette
- 2006 Chevrolet Corvette
- 2007 Chevrolet Corvette
- 2008 Chevrolet Corvette
- 2009 Chevrolet Corvette
- 2010 Chevrolet Corvette
- 2011 Chevrolet Corvette
- 2012 Chevrolet Corvette
- 2013 Chevrolet Corvette
Why Buy from Beefcake Racing?
Beefcake Racing is your trusted source for ATI Super Dampers and performance parts for your Corvette. We offer expert support, fast shipping, and competitive pricing on all ATI products. For personalized assistance, email sales@beefcakeracing.com or call 1-855-827-7223. Our experienced team will help you choose the right damper for your build.
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