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The Torque Range Modifier (TRM ) is an insert that broadens the available torque range of the machine allowing for better "hook up" in certain conditions. The TRM is not a sound damping device and you should see no difference in speed or horsepower. It cannot be used with a Quiet Core Insert because only one of these can occupy the space in the exhaust at one time. It can be used with a Spark Arrestor.
Torque Range Modifier Fits: - Performance Series
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