Harmonic Balancer Selection Chart

Stock Replacement	ATI Super Damper	ATI w/ HTD
-1 Corvette	-1 ATI (6 Rib Only)	-1 w/ HTD
-2 LS1 Camaro	-2 ATI (6 Rib Only)	-2 w/ HTD
-3 Truck	-3 ATI (6 Rib Only)	-3 w/ HTD Add On
LSA	LSA 8-Rib Add On LSA 4-Rib Add On

LS Harmonic Balancer & Spacing Guide

One of the most important steps of your swap is identifying the accessory drive “spacing” you need. This spacing is where the harmonic balancer positions your main drive belt for your accessories. Be aware of these variations that came from the GM factories: LS9, LS4, then the common 3: Corvette, Camaro LS1 and all GTO's, and Truck/SUV's. Additionally, harmonic balancers for dry and wet oil sumps are not interchangeable due to differences in crankshaft length.

Bracket Selection

To make this simple, our ICT Billet brackets are designed around these three crank pulley spacings which cover nearly all engines you will encounter:

• -1 spacing: Corvette, CTS-V, G8, SS Sedan
• -2 spacing: 1998–2002 Camaro, GTO
• -3 spacing: Trucks, SUVs, 2010–2015 Camaro

Once you know your spacing number, the matching bracket will end with that dash number. For example, 551668-2 fits a Camaro LS1, while 551668-3 fits a truck engine with a stock crank pulley.

Installation & Safety

Crank pulleys can be interchanged across nearly all wet-sump LS engines. Always remove balancers with a proper puller and reinstall using an installer tool. The crank bolt is torque-to-yield and must be replaced every time to prevent oil leaks from the sealing material on the bolt head.

Wet sump harmonic balancer bolt torque to 37 ft-lbs plus 140 degrees.

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OE Style Balancer Bolt
Point One Bolt