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ATI Damper - 5.67" - Aluminum - 6/4 Groove - 25% UD - 10% UD A/C - 1 PC (1998 - 2002 Camaro & Firebird / 2004 - 2006 GTO) ATI918845

ATI Damper - 5.67" - Aluminum - 6/4 Groove - 25% UD - 10% UD A/C - 1 PC (1998 - 2002 Camaro & Firebird / 2004 - 2006 GTO) ATI918845

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Item#:
APPATI918845
Price: $461.15
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UPC:
800157028625
Availability:
Special order
LTL:
N
MPN:
ATI918845
Product ID:
361575
Proposition 65:
N
Category:
Engine Components>Crankshaft Dampers
Core:
N
Clearance Item:
N

ATI Damper – 5.67in – Aluminum – 6/4 Groove – 25% UD – 10% A/C UD – 1Pc (1998–2002 Chevy Camaro & Pontiac Firebird / 2004–2006 Pontiac GTO) – ATI918845

Dual Underdrive Super Damper for LS1 Camaro, Firebird & GTO

The ATI 5.67-inch Aluminum Super Damper (part ATI918845) is engineered for LS1-powered 1998–2002 Camaros and Firebirds as well as the 2004–2006 Pontiac GTO. This 1-piece damper features a 6/4 groove pulley setup with a 25% main underdrive and 10% A/C underdrive, reducing parasitic drag while maintaining reliable accessory operation. It’s the perfect upgrade for street and strip builds that want power gains without deleting A/C. Precision-machined from lightweight aluminum, this damper delivers exceptional balance, smoother revs, and long-term durability under demanding RPM conditions.

Performance Highlights

  • 5.67-inch outer diameter fits compact LS engine bays
  • 25% main underdrive increases horsepower by reducing accessory load
  • 10% A/C underdrive retains comfort while improving efficiency
  • 6/4 groove pulley design supports full serpentine drive with A/C
  • Aluminum 1-piece construction for reduced rotating mass
  • SFI 18.1 certified for competition-level safety
  • Fully rebuildable for long service life and consistent performance

Quick Specs

  • Outer Diameter: 5.67 inches
  • Material: Aluminum
  • Pulley Style: 6/4 Groove
  • Main Underdrive: 25%
  • A/C Underdrive: 10%
  • Design: 1-Piece
  • Certification: SFI 18.1
  • Part Number: ATI918845

Why Choose ATI’s Dual Underdrive Super Damper?

The ATI918845 Super Damper is ideal for enthusiasts who want the benefits of an underdrive setup without losing A/C functionality. Its dual underdrive design reduces engine drag and frees up power while keeping cabin comfort intact. Backed by SFI 18.1 certification and ATI’s proven elastomer technology, this damper protects your LS engine from vibration and harmonic distortion at high RPM. It’s a smart, balanced performance upgrade for both daily drivers and weekend warriors.

Frequently Asked Questions

Does this damper retain A/C operation?

Yes. Unlike the No A/C version, the ATI918845 includes a 10% A/C underdrive pulley to maintain full A/C functionality.

How much power does a 25% underdrive free up?

Expect gains of around 5–10 horsepower by reducing accessory drag while improving throttle response.

Is this damper suitable for high-RPM performance?

Absolutely. It’s SFI 18.1 certified and built for both street and race-level durability.

Can the damper be serviced or rebuilt?

Yes. All ATI Super Dampers are fully rebuildable, ensuring long-term performance and reliability.

Fitment

  • 1998 Chevrolet Camaro
  • 1999 Chevrolet Camaro
  • 2000 Chevrolet Camaro
  • 2001 Chevrolet Camaro
  • 2002 Chevrolet Camaro
  • 1998 Pontiac Firebird
  • 1999 Pontiac Firebird
  • 2000 Pontiac Firebird
  • 2001 Pontiac Firebird
  • 2002 Pontiac Firebird
  • 2004 Pontiac GTO
  • 2005 Pontiac GTO
  • 2006 Pontiac GTO

Why Buy from Beefcake Racing?

Beefcake Racing is your trusted source for ATI Super Dampers and LS performance upgrades. We offer expert guidance, competitive pricing, and fast shipping. Contact us at sales@beefcakeracing.com or call 1-855-827-7223 to speak with our performance experts. Let us help you choose the perfect ATI damper for your LS-powered build.

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