ATI 917276 6.78" 10% Under-Drive Super Damper for GM LS Series

Vehicle Fitment

• GM LS-series engines (e.g., LS1 / LS2 / LS6 / LSX)
• Applications include Chevrolet Camaro, Firebird, Pontiac GTO, and other F- or V-body LS vehicles

Features

• SFI 18.1 certified for high-performance applications
• 10% under-drive to reduce accessory drag
• 6 outer grooves + 4 A/C groove for serpentine belt setups
• Laser-etched 360° timing marks for precision tuning
• Aluminum outer shell with steel hub for strength and reduced weight
• Black zinc-chromate finish for durability
• Internal balance design
• Rebuildable / tunable construction

Specifications

• Part Number: **ATI 917276**
• Outer Diameter: ~ 6.78"
• Under-Drive: 10%
• Groove Count: 6 (main) + 4 (A/C)
• Material: Aluminum / Steel
• Finish: Black zinc chromate
• SFI Rating: 18.1
• Engine Balance: Internal
• Weight: ~4.5 lb (as per vendor specs)

Included Components

• 1x ATI 917276 Super Damper (aluminum shell, steel hub)

Product Description

The **ATI 917276** Super Damper is engineered for GM LS-series engines and combines performance, reliability, and precision. Its 10% under-drive design helps reduce parasitic losses by slowing accessory drive, allowing your engine to maintain peak output while driving the alternator and A/C more efficiently.

Constructed with an aluminum shell and steel hub, the damper delivers strength without excessive weight. The built-in 6 + 4 groove design supports modern serpentine configurations, and the 360° laser-etched timing marks make ignition tuning precise and repeatable. Rated to SFI 18.1, this damper is built for both street and high-performance use.

With internal balance and rebuildable design, the 917276 offers long-term durability and tunability. It is ideal for builders upgrading LS1, LS2, or other GM Gen III/IV LS engines in Camaro, Firebird, GTO, or custom setups, especially when aiming for a street-strong damper that handles high RPMs and high stress.