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SKU: ATI917276 | UPC: 800157029677
ATI Damper 6.78in Aluminum 6/4 Groove 10% Underdrive LS1/LS2 F-Body GTO 10% UD A/C 3 Ring 1998-2006
This ATI crankshaft damper provides precise harmonic vibration control for LS1 and LS2 engines in 1998-2002 F-body Camaro Firebird and 2004-2006 Pontiac GTO vehicles. The 6.78-inch aluminum shell with integrated 10% underdrive pulley reduces accessory drag to gain 8-12 horsepower at the wheels while using stock belt routing. SFI 18.1 certification supports high-RPM durability for street and drag strip use.
Key Features
- Aluminum Shell: Lightweight at 10.9 lbs reduces front-end rotational mass for quicker engine response
- 10% Underdrive Pulley: Lowers alternator water pump and A/C speeds by 10% to recover 8-12 HP at the wheels
- 6/4 Groove Pattern: Matches stock LS pulley bolt pattern with 6-rib main 4-rib A/C grooves for direct bolt-on fit
- SFI 18.1 Certified: Exceeds NHRA IHRA standards for high-performance and drag racing safety
- 3-Ring Timing Marks: Clear white etched rings simplify TDC alignment during cam timing and degreeing
Product Notes
- Internally balanced for Gen III/IV LS1 LS2 LS6 cranks no balance issues
- Elastomer construction absorbs crank flex and harmonics effectively
- Ships ready-to-install with Grade 12.9 crank bolt included
Installation Notes
- Professional installation recommended.
- Torque crank bolt to 37 ft-lbs then 90 degrees using ARP moly lube
- Compatible with stock LS timing covers no modification required
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1998-2002 | Chevrolet | Camaro | SS Z28 Base V8 |
| 1998-2002 | Pontiac | Firebird | Trans Am WS6 Formula V8 |
| 2004-2006 | Pontiac | GTO | Base V8 |
Why Choose ATI?
- Proven in NHRA Pro Stock and Top Sportsman racing for decades
- CNC-machined in the USA from billet aluminum and steel
- Precision assembly maintains TDC accuracy within 1 degree
Frequently Asked Questions
-
Q: Will this damper fit my 2000 Camaro SS LS1 with A/C?
A: Yes it bolts directly to 1998-2002 F-body LS1 engines retaining full A/C function with stock belts -
Q: What material is the shell and inertia ring?
A: 6061-T6 aluminum shell with steel inertia ring bonded in high-strength elastomer -
Q: What is the warranty and install torque spec?
A: ATI provides 1-year warranty torque main crank bolt 37 ft-lbs initial plus 90 degree turn
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Secure foam-lined box
- Weight: 10.9 lbs net 12 lbs shipping
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