Rick's Free Auto Repair Advice

Posts Tagged: muffler delete

Muffler Delete

Why a muffler delete reduces engine performance Stock engines are designed for a certain amount of exhaust backpressure to lower the effects of fuel scavenging during the valve overlap stage of engine performance. If you perform a muffler delete without making any other changes to your camshaft, valves, variable valve timing mechanics or software, you’ll actually experience lower performance and MPG. That’s because a portion of your fuel is being swept right out the exhaust port during valve overlap, thus robbing you of fuel during the following intake stroke. Muffler … Read More


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