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Blog Post: Cadillac Muffler/Exhaust selection based on Target HP


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For a zero back-pressure exhaust, it can be shown that one should target 2.2 cfm (cubic feet per minute) of flow through the exhaust per engine horsepower of output. The Cadillac STS-V has a dual-2.5″ exhaust with dual mufflers.  The stock mufflers probably flow 160-200 CFM each, or 320-400 CFM together. The stock LC3 engine [...]

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Bruce

2023 Cadillac CT4-V Blackwing

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