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The size of the exhaust on the Chevy S-10 ranges from 2 1/4" to 2 1/2" depending on the type of engine in your truck. Knowing the exhaust size is crucial if you plan to upgrade it. Upgrading the exhaust system is a quick and simple way to boost engine performance. Replacing the factory exhaust with a high-performance exhaust and a high-flow catalytic converter can enhance your truck's power output and give it a louder, more aggressive sound when you rev the engine. Just remember that increasing the size beyond 2 1/2" without the right engine modifications could cause your engine to lose power.
The Chevy S10 features a 2.5-inch exhaust pipe.