ATI Damper 7.48in Aluminum 6/4 Groove 10% UD Excl SC Pulley 3 Ring (20162024 Chevrolet Camaro SS & ZL1 / 20162024 Cadillac CTS-V) ATI918857
10% Underdrive Super Damper for LT1 & LT4 Engines
The ATI 7.48-inch Aluminum Super Damper (part ATI918857) is built for 20162024 Camaro SS & ZL1 and 20162024 Cadillac CTS-V equipped with LT1 or LT4 engines. Featuring a 6/4 groove pulley design, 3-ring construction, and 10% underdrive ratio, this damper improves power efficiency by reducing accessory drag without compromising reliability. The excluded supercharger pulley design allows flexibility for custom blower drive setups. With its precision-balanced aluminum shell, SFI 18.1 certification, and fully rebuildable design, its the perfect upgrade for high-performance street and track applications.
Performance Highlights
- 10% underdrive ratio reduces parasitic loss for measurable horsepower gains
- 7.48-inch diameter provides ideal damping for LT1 and LT4 platforms
- 6/4 groove pulley setup supports multiple accessory belt configurations
- Excludes supercharger pulley for custom or upgraded blower drive systems
- 3-ring construction enhances vibration control and crankshaft protection
- Lightweight aluminum body minimizes rotating mass for faster throttle response
- SFI 18.1 certified for legal use in competition and high-RPM environments
- Fully rebuildable to maintain precision and performance over time
Quick Specs
- Outer Diameter: 7.48 inches
- Material: Aluminum
- Pulley Style: 6/4 Groove
- Underdrive: 10% Reduction
- Supercharger Pulley: Excluded
- Design: 3 Ring, Rebuildable
- Certification: SFI 18.1
- Engine Compatibility: LT1 / LT4
- Part Number: ATI918857
Why Choose ATIs 10% Underdrive LT-Series Super Damper?
The ATI918857 Super Damper delivers precision harmonic control for LT1 and LT4 wet-sump or dry-sump engines. Its 10% underdrive design reduces accessory drag, freeing up horsepower while maintaining full accessory functionality. The excluded SC pulley allows for flexibility in boosted builds with custom supercharger drives. Engineered for high-RPM stability, this damper protects your crankshaft, reduces vibration, and ensures consistent performance on street or track.
Frequently Asked Questions
Whats the benefit of a 10% underdrive damper?
It lowers accessory speed by 10%, reducing drag and freeing up 510 horsepower while maintaining reliability for daily or track use.
Does this damper include a supercharger pulley?
No. This Excl SC Pulley version is made for custom blower drive systems, offering more tuning flexibility.
Is this compatible with both LT1 and LT4 engines?
Yes. The ATI918857 fits all LT1 and LT4 engines used in Camaro SS, ZL1, and CTS-V models from 20162024.
Is it SFI certified and rebuildable?
Absolutely. Its SFI 18.1 certified and fully rebuildable for lasting performance and safety assurance.
Fitment
- 2016 Chevrolet Camaro SS
- 2017 Chevrolet Camaro SS
- 2018 Chevrolet Camaro SS
- 2019 Chevrolet Camaro SS
- 2020 Chevrolet Camaro SS
- 2021 Chevrolet Camaro SS
- 2022 Chevrolet Camaro SS
- 2023 Chevrolet Camaro SS
- 2024 Chevrolet Camaro SS
- 2016 Chevrolet Camaro ZL1
- 2017 Chevrolet Camaro ZL1
- 2018 Chevrolet Camaro ZL1
- 2019 Chevrolet Camaro ZL1
- 2020 Chevrolet Camaro ZL1
- 2021 Chevrolet Camaro ZL1
- 2022 Chevrolet Camaro ZL1
- 2023 Chevrolet Camaro ZL1
- 2024 Chevrolet Camaro ZL1
- 2016 Cadillac CTS-V
- 2017 Cadillac CTS-V
- 2018 Cadillac CTS-V
- 2019 Cadillac CTS-V
- 2020 Cadillac CTS-V
- 2021 Cadillac CTS-V
- 2022 Cadillac CTS-V
- 2023 Cadillac CTS-V
- 2024 Cadillac CTS-V
Why Buy from Beefcake Racing?
Beefcake Racing is your trusted source for ATI Super Dampers and LT-series performance upgrades. We offer expert guidance, 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 of performance specialists will help you select the right damper for your LT1 or LT4 build.
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