What does deleting the resonator do?

Three main benefits for removing exhaust resonators are to make your vehicle lighter, to give your engine a louder tone, and to get a slight increase in your horsepower. Since resonators help reduce the engine sound, when removed, your truck or car will sound like a muscle car, emitting much louder and obnoxious tone.

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Does removing the resonator increase horsepower?

The resonator delete can sometimes improve your overall horsepower rating if there is heavy buildup within your vehicle’s exhaust system. … Expect a maximum boost of about 5 horsepower for most vehicles in the best-case scenario.