Which Loses More Power: A Three-Inch Exhaust Or A 2.5 Inch Exhaust? Engine Masters Tests Out The Backpressure Theory On A Chevrolet 454!

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Here’s a fun question that you can use to fire up just about any message board: what does a high-horsepower engine like better: a 3″ exhaust to breath better with, or a 2.5″ exhaust that offers up a bit of back pressure and that opening up the flow of air out of the engine will […]

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