Watch this video and learn the ins and outs of Summit Racing Street & Strip® Bracket Racer SFI Harmonic Dampers for LS engine applications.

These particular harmonic balancers were designed with bracket racers in mind. They are constructed from carbon steel, have been tested up to 12,500 rpm, and are 18.1 SFI-rated which will pass tech inspection at virtually any dragstrip.

For anyone interested in timing adjustments on carbureted conversions (basically anyone not driving a late-model vehicle), these LS harmonic balancers have engraved timing marks. They also accommodate factory serpentine belt setups.

Overview of Summit Racing LS Harmonic Balancers

SUM-C2500 – Applications: Camaro/Firebird/GTO; LS1

SUM-C2501 – Applications: Corvette; LS1, LS2, LS3, LS6

SUM-C2502 – Applications: Camaro/Firebird/GTO; LS1 – Underdriven

SUM-C2503 – Applications: Corvette/G8; LS1, LS2, LS3, LS6 – Underdriven

SUM-C2520 – Applications: GM Truck/SUV; 4.8L, 5.3L, 6L (25 percent underdrive; includes alternator pulley)

Author: Matt Griswold

After a 10-year newspaper journalism career, Matt Griswold spent another decade writing about the automotive aftermarket and motorsports. He was part of the original OnAllCylinders editorial team when it launched in 2012.