Rattler® Crankshaft Balancers

Fits Chevrolet internally balanced big block V8 engines. Unit is 6 1/4-inch diameter, weighs 8 pounds, 4 ounces and has a standard 3-bolt pulley pattern.

The Rattler® by TCI® is a pendulum absorber developed to control amplitudes of vibration and angle of crankshaft twist like no other design. Its ability to absorb rather than dampen is the key to its success. The Rattler® is effective for the entire RPM range, and extends crankshaft and bearing life. The Rattler® also has the ability to allow the engine to run smoother during operation, which can potentially increase valve train stability and life.